Home / 20,610.34-28,442.43-11,178.90

Finding the Fourth Proportional to 20,610.34, 28,442.43 and 11,178.90

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Solution

The fourth proportional to 20,610.34, 28,442.43 and 11,178.90 is: 15,426.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,610.34 : 28,442.43 = 11,178.90 : x
  2. Step 2: Convert to fraction form
    20,610.34/28,442.43 = 11,178.90/x
  3. Step 3: Cross multiply
    20,610.34x = 28,442.43 × 11,178.90
  4. Step 4: Simplify right side
    20,610.34x = 317,955,080.73
  5. Step 5: Solve for x
    x = 317,955,080.73/20,610.34
  6. Step 6: Final answer
    x = 15,426.97

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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.