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Finding the Fourth Proportional to 6,666.76, 9,209.48 and 4,813.48

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Solution

The fourth proportional to 6,666.76, 9,209.48 and 4,813.48 is: 6,649.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,666.76 : 9,209.48 = 4,813.48 : x
  2. Step 2: Convert to fraction form
    6,666.76/9,209.48 = 4,813.48/x
  3. Step 3: Cross multiply
    6,666.76x = 9,209.48 × 4,813.48
  4. Step 4: Simplify right side
    6,666.76x = 44,329,647.79
  5. Step 5: Solve for x
    x = 44,329,647.79/6,666.76
  6. Step 6: Final answer
    x = 6,649.35

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Half scale
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Double scale
Find fourth proportional to 6,667.76, 9,210.86 and 4,814.48
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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.