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Finding the Fourth Proportional to 16,389.62, 24,603.93 and 15,721.23

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Solution

The fourth proportional to 16,389.62, 24,603.93 and 15,721.23 is: 23,600.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,389.62 : 24,603.93 = 15,721.23 : x
  2. Step 2: Convert to fraction form
    16,389.62/24,603.93 = 15,721.23/x
  3. Step 3: Cross multiply
    16,389.62x = 24,603.93 × 15,721.23
  4. Step 4: Simplify right side
    16,389.62x = 386,804,042.43
  5. Step 5: Solve for x
    x = 386,804,042.43/16,389.62
  6. Step 6: Final answer
    x = 23,600.56

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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.