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Finding the Fourth Proportional to 39,375.52, 54,339.52 and 21,472

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Solution

The fourth proportional to 39,375.52, 54,339.52 and 21,472 is: 29,632.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,375.52 : 54,339.52 = 21,472 : x
  2. Step 2: Convert to fraction form
    39,375.52/54,339.52 = 21,472/x
  3. Step 3: Cross multiply
    39,375.52x = 54,339.52 × 21,472
  4. Step 4: Simplify right side
    39,375.52x = 1,166,778,173.44
  5. Step 5: Solve for x
    x = 1,166,778,173.44/39,375.52
  6. Step 6: Final answer
    x = 29,632.07

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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.