Home / 28,560.38-39,407.85-18,487.42

Finding the Fourth Proportional to 28,560.38, 39,407.85 and 18,487.42

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Solution

The fourth proportional to 28,560.38, 39,407.85 and 18,487.42 is: 25,509.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,560.38 : 39,407.85 = 18,487.42 : x
  2. Step 2: Convert to fraction form
    28,560.38/39,407.85 = 18,487.42/x
  3. Step 3: Cross multiply
    28,560.38x = 39,407.85 × 18,487.42
  4. Step 4: Simplify right side
    28,560.38x = 728,549,375.73
  5. Step 5: Solve for x
    x = 728,549,375.73/28,560.38
  6. Step 6: Final answer
    x = 25,509.10

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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.