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Finding the Fourth Proportional to 8,729.43, 12,995.43 and 8,677.55

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Solution

The fourth proportional to 8,729.43, 12,995.43 and 8,677.55 is: 12,918.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,729.43 : 12,995.43 = 8,677.55 : x
  2. Step 2: Convert to fraction form
    8,729.43/12,995.43 = 8,677.55/x
  3. Step 3: Cross multiply
    8,729.43x = 12,995.43 × 8,677.55
  4. Step 4: Simplify right side
    8,729.43x = 112,768,428.62
  5. Step 5: Solve for x
    x = 112,768,428.62/8,729.43
  6. Step 6: Final answer
    x = 12,918.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.