Home / 20,882.55-28,819.29-11,451.11

Finding the Fourth Proportional to 20,882.55, 28,819.29 and 11,451.11

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Solution

The fourth proportional to 20,882.55, 28,819.29 and 11,451.11 is: 15,803.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,882.55 : 28,819.29 = 11,451.11 : x
  2. Step 2: Convert to fraction form
    20,882.55/28,819.29 = 11,451.11/x
  3. Step 3: Cross multiply
    20,882.55x = 28,819.29 × 11,451.11
  4. Step 4: Simplify right side
    20,882.55x = 330,012,859.91
  5. Step 5: Solve for x
    x = 330,012,859.91/20,882.55
  6. Step 6: Final answer
    x = 15,803.28

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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.