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Finding the Fourth Proportional to 21,557.65, 32,269.65 and 11,672.41

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Solution

The fourth proportional to 21,557.65, 32,269.65 and 11,672.41 is: 17,472.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,557.65 : 32,269.65 = 11,672.41 : x
  2. Step 2: Convert to fraction form
    21,557.65/32,269.65 = 11,672.41/x
  3. Step 3: Cross multiply
    21,557.65x = 32,269.65 × 11,672.41
  4. Step 4: Simplify right side
    21,557.65x = 376,664,585.36
  5. Step 5: Solve for x
    x = 376,664,585.36/21,557.65
  6. Step 6: Final answer
    x = 17,472.43

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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.