Home / 20,449.76-28,218.12-11,496.20

Finding the Fourth Proportional to 20,449.76, 28,218.12 and 11,496.20

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Solution

The fourth proportional to 20,449.76, 28,218.12 and 11,496.20 is: 15,863.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,449.76 : 28,218.12 = 11,496.20 : x
  2. Step 2: Convert to fraction form
    20,449.76/28,218.12 = 11,496.20/x
  3. Step 3: Cross multiply
    20,449.76x = 28,218.12 × 11,496.20
  4. Step 4: Simplify right side
    20,449.76x = 324,401,151.14
  5. Step 5: Solve for x
    x = 324,401,151.14/20,449.76
  6. Step 6: Final answer
    x = 15,863.32

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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.