Home / 20,922.03-28,872.45-11,491.20

Finding the Fourth Proportional to 20,922.03, 28,872.45 and 11,491.20

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Solution

The fourth proportional to 20,922.03, 28,872.45 and 11,491.20 is: 15,857.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.03 : 28,872.45 = 11,491.20 : x
  2. Step 2: Convert to fraction form
    20,922.03/28,872.45 = 11,491.20/x
  3. Step 3: Cross multiply
    20,922.03x = 28,872.45 × 11,491.20
  4. Step 4: Simplify right side
    20,922.03x = 331,779,097.44
  5. Step 5: Solve for x
    x = 331,779,097.44/20,922.03
  6. Step 6: Final answer
    x = 15,857.88

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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.