Home / 20,401.88-28,154.12-11,449.15

Finding the Fourth Proportional to 20,401.88, 28,154.12 and 11,449.15

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Solution

The fourth proportional to 20,401.88, 28,154.12 and 11,449.15 is: 15,799.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,401.88 : 28,154.12 = 11,449.15 : x
  2. Step 2: Convert to fraction form
    20,401.88/28,154.12 = 11,449.15/x
  3. Step 3: Cross multiply
    20,401.88x = 28,154.12 × 11,449.15
  4. Step 4: Simplify right side
    20,401.88x = 322,340,743.00
  5. Step 5: Solve for x
    x = 322,340,743.00/20,401.88
  6. Step 6: Final answer
    x = 15,799.56

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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.