Home / 11,578.47-15,965.37-8,385.45

Finding the Fourth Proportional to 11,578.47, 15,965.37 and 8,385.45

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Solution

The fourth proportional to 11,578.47, 15,965.37 and 8,385.45 is: 11,562.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,578.47 : 15,965.37 = 8,385.45 : x
  2. Step 2: Convert to fraction form
    11,578.47/15,965.37 = 8,385.45/x
  3. Step 3: Cross multiply
    11,578.47x = 15,965.37 × 8,385.45
  4. Step 4: Simplify right side
    11,578.47x = 133,876,811.87
  5. Step 5: Solve for x
    x = 133,876,811.87/11,578.47
  6. Step 6: Final answer
    x = 11,562.56

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.