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Finding the Fourth Proportional to 8,531.30, 12,810.85 and 5,265.16

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Solution

The fourth proportional to 8,531.30, 12,810.85 and 5,265.16 is: 7,906.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,531.30 : 12,810.85 = 5,265.16 : x
  2. Step 2: Convert to fraction form
    8,531.30/12,810.85 = 5,265.16/x
  3. Step 3: Cross multiply
    8,531.30x = 12,810.85 × 5,265.16
  4. Step 4: Simplify right side
    8,531.30x = 67,451,129.80
  5. Step 5: Solve for x
    x = 67,451,129.80/8,531.30
  6. Step 6: Final answer
    x = 7,906.31

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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.