Home / 20,882.40-28,817.68-11,451.12

Finding the Fourth Proportional to 20,882.40, 28,817.68 and 11,451.12

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Solution

The fourth proportional to 20,882.40, 28,817.68 and 11,451.12 is: 15,802.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,882.40 : 28,817.68 = 11,451.12 : x
  2. Step 2: Convert to fraction form
    20,882.40/28,817.68 = 11,451.12/x
  3. Step 3: Cross multiply
    20,882.40x = 28,817.68 × 11,451.12
  4. Step 4: Simplify right side
    20,882.40x = 329,994,711.80
  5. Step 5: Solve for x
    x = 329,994,711.80/20,882.40
  6. Step 6: Final answer
    x = 15,802.53

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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.