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Finding the Fourth Proportional to 8,691.62, 13,038.69 and 3,497.18

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Solution

The fourth proportional to 8,691.62, 13,038.69 and 3,497.18 is: 5,246.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691.62 : 13,038.69 = 3,497.18 : x
  2. Step 2: Convert to fraction form
    8,691.62/13,038.69 = 3,497.18/x
  3. Step 3: Cross multiply
    8,691.62x = 13,038.69 × 3,497.18
  4. Step 4: Simplify right side
    8,691.62x = 45,598,645.89
  5. Step 5: Solve for x
    x = 45,598,645.89/8,691.62
  6. Step 6: Final answer
    x = 5,246.28

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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.