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Finding the Fourth Proportional to 8,712.72, 13,068.84 and 3,715.32

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Solution

The fourth proportional to 8,712.72, 13,068.84 and 3,715.32 is: 5,572.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,712.72 : 13,068.84 = 3,715.32 : x
  2. Step 2: Convert to fraction form
    8,712.72/13,068.84 = 3,715.32/x
  3. Step 3: Cross multiply
    8,712.72x = 13,068.84 × 3,715.32
  4. Step 4: Simplify right side
    8,712.72x = 48,554,922.63
  5. Step 5: Solve for x
    x = 48,554,922.63/8,712.72
  6. Step 6: Final answer
    x = 5,572.88

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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.