Home / 20,432.91-28,198.62-15,388.23

Finding the Fourth Proportional to 20,432.91, 28,198.62 and 15,388.23

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Solution

The fourth proportional to 20,432.91, 28,198.62 and 15,388.23 is: 21,236.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,432.91 : 28,198.62 = 15,388.23 : x
  2. Step 2: Convert to fraction form
    20,432.91/28,198.62 = 15,388.23/x
  3. Step 3: Cross multiply
    20,432.91x = 28,198.62 × 15,388.23
  4. Step 4: Simplify right side
    20,432.91x = 433,926,850.24
  5. Step 5: Solve for x
    x = 433,926,850.24/20,432.91
  6. Step 6: Final answer
    x = 21,236.66

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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.