Home / 20,635.20-28,478.16-12,567.96

Finding the Fourth Proportional to 20,635.20, 28,478.16 and 12,567.96

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Solution

The fourth proportional to 20,635.20, 28,478.16 and 12,567.96 is: 17,344.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,635.20 : 28,478.16 = 12,567.96 : x
  2. Step 2: Convert to fraction form
    20,635.20/28,478.16 = 12,567.96/x
  3. Step 3: Cross multiply
    20,635.20x = 28,478.16 × 12,567.96
  4. Step 4: Simplify right side
    20,635.20x = 357,912,375.75
  5. Step 5: Solve for x
    x = 357,912,375.75/20,635.20
  6. Step 6: Final answer
    x = 17,344.75

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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.