Home / 20,432.16-28,197.59-15,387.48

Finding the Fourth Proportional to 20,432.16, 28,197.59 and 15,387.48

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Solution

The fourth proportional to 20,432.16, 28,197.59 and 15,387.48 is: 21,235.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,432.16 : 28,197.59 = 15,387.48 : x
  2. Step 2: Convert to fraction form
    20,432.16/28,197.59 = 15,387.48/x
  3. Step 3: Cross multiply
    20,432.16x = 28,197.59 × 15,387.48
  4. Step 4: Simplify right side
    20,432.16x = 433,889,775.24
  5. Step 5: Solve for x
    x = 433,889,775.24/20,432.16
  6. Step 6: Final answer
    x = 21,235.63

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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.