Home / 20,721.50-31,082.47-16,587.79

Finding the Fourth Proportional to 20,721.50, 31,082.47 and 16,587.79

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Solution

The fourth proportional to 20,721.50, 31,082.47 and 16,587.79 is: 24,881.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.50 : 31,082.47 = 16,587.79 : x
  2. Step 2: Convert to fraction form
    20,721.50/31,082.47 = 16,587.79/x
  3. Step 3: Cross multiply
    20,721.50x = 31,082.47 × 16,587.79
  4. Step 4: Simplify right side
    20,721.50x = 515,589,365.87
  5. Step 5: Solve for x
    x = 515,589,365.87/20,721.50
  6. Step 6: Final answer
    x = 24,881.85

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1.5x scale

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.