Home / 20,587.59-28,390.05-18,311.76

Finding the Fourth Proportional to 20,587.59, 28,390.05 and 18,311.76

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Solution

The fourth proportional to 20,587.59, 28,390.05 and 18,311.76 is: 25,251.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.59 : 28,390.05 = 18,311.76 : x
  2. Step 2: Convert to fraction form
    20,587.59/28,390.05 = 18,311.76/x
  3. Step 3: Cross multiply
    20,587.59x = 28,390.05 × 18,311.76
  4. Step 4: Simplify right side
    20,587.59x = 519,871,781.99
  5. Step 5: Solve for x
    x = 519,871,781.99/20,587.59
  6. Step 6: Final answer
    x = 25,251.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.