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Finding the Fourth Proportional to 20,737.70, 28,609.86 and 12,766.08

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Solution

The fourth proportional to 20,737.70, 28,609.86 and 12,766.08 is: 17,612.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,737.70 : 28,609.86 = 12,766.08 : x
  2. Step 2: Convert to fraction form
    20,737.70/28,609.86 = 12,766.08/x
  3. Step 3: Cross multiply
    20,737.70x = 28,609.86 × 12,766.08
  4. Step 4: Simplify right side
    20,737.70x = 365,235,761.55
  5. Step 5: Solve for x
    x = 365,235,761.55/20,737.70
  6. Step 6: Final answer
    x = 17,612.16

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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.