Home / 20,882.12-28,818.78-11,451.29

Finding the Fourth Proportional to 20,882.12, 28,818.78 and 11,451.29

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Solution

The fourth proportional to 20,882.12, 28,818.78 and 11,451.29 is: 15,803.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,882.12 : 28,818.78 = 11,451.29 : x
  2. Step 2: Convert to fraction form
    20,882.12/28,818.78 = 11,451.29/x
  3. Step 3: Cross multiply
    20,882.12x = 28,818.78 × 11,451.29
  4. Step 4: Simplify right side
    20,882.12x = 330,012,207.23
  5. Step 5: Solve for x
    x = 330,012,207.23/20,882.12
  6. Step 6: Final answer
    x = 15,803.58

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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.