Home / 20,489.28-30,748.50-15,813.96

Finding the Fourth Proportional to 20,489.28, 30,748.50 and 15,813.96

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Solution

The fourth proportional to 20,489.28, 30,748.50 and 15,813.96 is: 23,732.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.28 : 30,748.50 = 15,813.96 : x
  2. Step 2: Convert to fraction form
    20,489.28/30,748.50 = 15,813.96/x
  3. Step 3: Cross multiply
    20,489.28x = 30,748.50 × 15,813.96
  4. Step 4: Simplify right side
    20,489.28x = 486,255,549.06
  5. Step 5: Solve for x
    x = 486,255,549.06/20,489.28
  6. Step 6: Final answer
    x = 23,732.19

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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.