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Finding the Fourth Proportional to 10,531.62, 15,763.14 and 7,757.20

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Solution

The fourth proportional to 10,531.62, 15,763.14 and 7,757.20 is: 11,610.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,531.62 : 15,763.14 = 7,757.20 : x
  2. Step 2: Convert to fraction form
    10,531.62/15,763.14 = 7,757.20/x
  3. Step 3: Cross multiply
    10,531.62x = 15,763.14 × 7,757.20
  4. Step 4: Simplify right side
    10,531.62x = 122,277,829.61
  5. Step 5: Solve for x
    x = 122,277,829.61/10,531.62
  6. Step 6: Final answer
    x = 11,610.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.