Home / 28,902.08-39,861.12-20,432.72

Finding the Fourth Proportional to 28,902.08, 39,861.12 and 20,432.72

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Solution

The fourth proportional to 28,902.08, 39,861.12 and 20,432.72 is: 28,180.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,902.08 : 39,861.12 = 20,432.72 : x
  2. Step 2: Convert to fraction form
    28,902.08/39,861.12 = 20,432.72/x
  3. Step 3: Cross multiply
    28,902.08x = 39,861.12 × 20,432.72
  4. Step 4: Simplify right side
    28,902.08x = 814,471,103.85
  5. Step 5: Solve for x
    x = 814,471,103.85/28,902.08
  6. Step 6: Final answer
    x = 28,180.36

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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.