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Finding the Fourth Proportional to 18,612.72, 25,687.62 and 10,656

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Solution

The fourth proportional to 18,612.72, 25,687.62 and 10,656 is: 14,706.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,612.72 : 25,687.62 = 10,656 : x
  2. Step 2: Convert to fraction form
    18,612.72/25,687.62 = 10,656/x
  3. Step 3: Cross multiply
    18,612.72x = 25,687.62 × 10,656
  4. Step 4: Simplify right side
    18,612.72x = 273,727,278.72
  5. Step 5: Solve for x
    x = 273,727,278.72/18,612.72
  6. Step 6: Final answer
    x = 14,706.46

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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.