Home / 31,845.28-43,966.38-20,520.40

Finding the Fourth Proportional to 31,845.28, 43,966.38 and 20,520.40

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Solution

The fourth proportional to 31,845.28, 43,966.38 and 20,520.40 is: 28,330.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,845.28 : 43,966.38 = 20,520.40 : x
  2. Step 2: Convert to fraction form
    31,845.28/43,966.38 = 20,520.40/x
  3. Step 3: Cross multiply
    31,845.28x = 43,966.38 × 20,520.40
  4. Step 4: Simplify right side
    31,845.28x = 902,207,704.15
  5. Step 5: Solve for x
    x = 902,207,704.15/31,845.28
  6. Step 6: Final answer
    x = 28,330.97

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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.