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Finding the Fourth Proportional to 15,512.87, 21,407.72 and 8,439.27

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Solution

The fourth proportional to 15,512.87, 21,407.72 and 8,439.27 is: 11,646.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,512.87 : 21,407.72 = 8,439.27 : x
  2. Step 2: Convert to fraction form
    15,512.87/21,407.72 = 8,439.27/x
  3. Step 3: Cross multiply
    15,512.87x = 21,407.72 × 8,439.27
  4. Step 4: Simplify right side
    15,512.87x = 180,665,486.97
  5. Step 5: Solve for x
    x = 180,665,486.97/15,512.87
  6. Step 6: Final answer
    x = 11,646.17

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.