Home / 20,721.39-31,082.30-16,587.68

Finding the Fourth Proportional to 20,721.39, 31,082.30 and 16,587.68

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Solution

The fourth proportional to 20,721.39, 31,082.30 and 16,587.68 is: 24,881.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.39 : 31,082.30 = 16,587.68 : x
  2. Step 2: Convert to fraction form
    20,721.39/31,082.30 = 16,587.68/x
  3. Step 3: Cross multiply
    20,721.39x = 31,082.30 × 16,587.68
  4. Step 4: Simplify right side
    20,721.39x = 515,583,069.92
  5. Step 5: Solve for x
    x = 515,583,069.92/20,721.39
  6. Step 6: Final answer
    x = 24,881.68

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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.