Home / 8,620,390.78-11,947,489.67-8,458,965.57

Finding the Fourth Proportional to 8,620,390.78, 11,947,489.67 and 8,458,965.57

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Solution

The fourth proportional to 8,620,390.78, 11,947,489.67 and 8,458,965.57 is: 11,723,761.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620,390.78 : 11,947,489.67 = 8,458,965.57 : x
  2. Step 2: Convert to fraction form
    8,620,390.78/11,947,489.67 = 8,458,965.57/x
  3. Step 3: Cross multiply
    8,620,390.78x = 11,947,489.67 × 8,458,965.57
  4. Step 4: Simplify right side
    8,620,390.78x = 101,063,403,832,411.16
  5. Step 5: Solve for x
    x = 101,063,403,832,411.16/8,620,390.78
  6. Step 6: Final answer
    x = 11,723,761.31

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Half scale
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Double scale
Find fourth proportional to 8,620,391.78, 11,947,491.06 and 8,458,966.57
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.