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Finding the Fourth Proportional to 8,391.71, 11,581.17 and 5,554.14

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Solution

The fourth proportional to 8,391.71, 11,581.17 and 5,554.14 is: 7,665.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391.71 : 11,581.17 = 5,554.14 : x
  2. Step 2: Convert to fraction form
    8,391.71/11,581.17 = 5,554.14/x
  3. Step 3: Cross multiply
    8,391.71x = 11,581.17 × 5,554.14
  4. Step 4: Simplify right side
    8,391.71x = 64,323,375.29
  5. Step 5: Solve for x
    x = 64,323,375.29/8,391.71
  6. Step 6: Final answer
    x = 7,665.11

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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.