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Finding the Fourth Proportional to 20,472.71, 30,664.49 and 12,551.27

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Solution

The fourth proportional to 20,472.71, 30,664.49 and 12,551.27 is: 18,799.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,472.71 : 30,664.49 = 12,551.27 : x
  2. Step 2: Convert to fraction form
    20,472.71/30,664.49 = 12,551.27/x
  3. Step 3: Cross multiply
    20,472.71x = 30,664.49 × 12,551.27
  4. Step 4: Simplify right side
    20,472.71x = 384,878,077.32
  5. Step 5: Solve for x
    x = 384,878,077.32/20,472.71
  6. Step 6: Final answer
    x = 18,799.57

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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.