Home / 20,622.78-28,458.68-11,191.14

Finding the Fourth Proportional to 20,622.78, 28,458.68 and 11,191.14

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Solution

The fourth proportional to 20,622.78, 28,458.68 and 11,191.14 is: 15,443.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.78 : 28,458.68 = 11,191.14 : x
  2. Step 2: Convert to fraction form
    20,622.78/28,458.68 = 11,191.14/x
  3. Step 3: Cross multiply
    20,622.78x = 28,458.68 × 11,191.14
  4. Step 4: Simplify right side
    20,622.78x = 318,485,016.14
  5. Step 5: Solve for x
    x = 318,485,016.14/20,622.78
  6. Step 6: Final answer
    x = 15,443.36

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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.