Home / 20,721.45-31,082.39-16,587.74

Finding the Fourth Proportional to 20,721.45, 31,082.39 and 16,587.74

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Solution

The fourth proportional to 20,721.45, 31,082.39 and 16,587.74 is: 24,881.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.45 : 31,082.39 = 16,587.74 : x
  2. Step 2: Convert to fraction form
    20,721.45/31,082.39 = 16,587.74/x
  3. Step 3: Cross multiply
    20,721.45x = 31,082.39 × 16,587.74
  4. Step 4: Simplify right side
    20,721.45x = 515,586,603.90
  5. Step 5: Solve for x
    x = 515,586,603.90/20,721.45
  6. Step 6: Final answer
    x = 24,881.78

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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.