Home / 28,229.20-38,958.60-15,658

Finding the Fourth Proportional to 28,229.20, 38,958.60 and 15,658

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Solution

The fourth proportional to 28,229.20, 38,958.60 and 15,658 is: 21,609.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,229.20 : 38,958.60 = 15,658 : x
  2. Step 2: Convert to fraction form
    28,229.20/38,958.60 = 15,658/x
  3. Step 3: Cross multiply
    28,229.20x = 38,958.60 × 15,658
  4. Step 4: Simplify right side
    28,229.20x = 610,013,758.80
  5. Step 5: Solve for x
    x = 610,013,758.80/28,229.20
  6. Step 6: Final answer
    x = 21,609.32

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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.