Home / 20,721.52-31,082.49-16,587.80

Finding the Fourth Proportional to 20,721.52, 31,082.49 and 16,587.80

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Solution

The fourth proportional to 20,721.52, 31,082.49 and 16,587.80 is: 24,881.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.52 : 31,082.49 = 16,587.80 : x
  2. Step 2: Convert to fraction form
    20,721.52/31,082.49 = 16,587.80/x
  3. Step 3: Cross multiply
    20,721.52x = 31,082.49 × 16,587.80
  4. Step 4: Simplify right side
    20,721.52x = 515,590,044.68
  5. Step 5: Solve for x
    x = 515,590,044.68/20,721.52
  6. Step 6: Final answer
    x = 24,881.87

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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.