Home / 20,397.24-28,121.90-13,214.36

Finding the Fourth Proportional to 20,397.24, 28,121.90 and 13,214.36

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Solution

The fourth proportional to 20,397.24, 28,121.90 and 13,214.36 is: 18,218.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,397.24 : 28,121.90 = 13,214.36 : x
  2. Step 2: Convert to fraction form
    20,397.24/28,121.90 = 13,214.36/x
  3. Step 3: Cross multiply
    20,397.24x = 28,121.90 × 13,214.36
  4. Step 4: Simplify right side
    20,397.24x = 371,612,910.48
  5. Step 5: Solve for x
    x = 371,612,910.48/20,397.24
  6. Step 6: Final answer
    x = 18,218.78

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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.