Home / 21,207.27-31,761.68-20,469.18

Finding the Fourth Proportional to 21,207.27, 31,761.68 and 20,469.18

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Solution

The fourth proportional to 21,207.27, 31,761.68 and 20,469.18 is: 30,656.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,207.27 : 31,761.68 = 20,469.18 : x
  2. Step 2: Convert to fraction form
    21,207.27/31,761.68 = 20,469.18/x
  3. Step 3: Cross multiply
    21,207.27x = 31,761.68 × 20,469.18
  4. Step 4: Simplify right side
    21,207.27x = 650,135,442.68
  5. Step 5: Solve for x
    x = 650,135,442.68/21,207.27
  6. Step 6: Final answer
    x = 30,656.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.