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Finding the Fourth Proportional to 8,489.90, 12,734.85 and 5,725.10

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Solution

The fourth proportional to 8,489.90, 12,734.85 and 5,725.10 is: 8,587.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,489.90 : 12,734.85 = 5,725.10 : x
  2. Step 2: Convert to fraction form
    8,489.90/12,734.85 = 5,725.10/x
  3. Step 3: Cross multiply
    8,489.90x = 12,734.85 × 5,725.10
  4. Step 4: Simplify right side
    8,489.90x = 72,908,289.74
  5. Step 5: Solve for x
    x = 72,908,289.74/8,489.90
  6. Step 6: Final answer
    x = 8,587.65

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Similar ratio
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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.