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Finding the Fourth Proportional to 8,690.47, 13,035.68 and 7,516.97

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Solution

The fourth proportional to 8,690.47, 13,035.68 and 7,516.97 is: 11,275.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.47 : 13,035.68 = 7,516.97 : x
  2. Step 2: Convert to fraction form
    8,690.47/13,035.68 = 7,516.97/x
  3. Step 3: Cross multiply
    8,690.47x = 13,035.68 × 7,516.97
  4. Step 4: Simplify right side
    8,690.47x = 97,988,712.73
  5. Step 5: Solve for x
    x = 97,988,712.73/8,690.47
  6. Step 6: Final answer
    x = 11,275.42

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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.