Home / 20,432.10-28,184.79-12,865.43

Finding the Fourth Proportional to 20,432.10, 28,184.79 and 12,865.43

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Solution

The fourth proportional to 20,432.10, 28,184.79 and 12,865.43 is: 17,747.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,432.10 : 28,184.79 = 12,865.43 : x
  2. Step 2: Convert to fraction form
    20,432.10/28,184.79 = 12,865.43/x
  3. Step 3: Cross multiply
    20,432.10x = 28,184.79 × 12,865.43
  4. Step 4: Simplify right side
    20,432.10x = 362,609,452.96
  5. Step 5: Solve for x
    x = 362,609,452.96/20,432.10
  6. Step 6: Final answer
    x = 17,747.05

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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.