Home / 22,635.60-31,171.20-21,191.58

Finding the Fourth Proportional to 22,635.60, 31,171.20 and 21,191.58

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Solution

The fourth proportional to 22,635.60, 31,171.20 and 21,191.58 is: 29,182.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,635.60 : 31,171.20 = 21,191.58 : x
  2. Step 2: Convert to fraction form
    22,635.60/31,171.20 = 21,191.58/x
  3. Step 3: Cross multiply
    22,635.60x = 31,171.20 × 21,191.58
  4. Step 4: Simplify right side
    22,635.60x = 660,566,978.50
  5. Step 5: Solve for x
    x = 660,566,978.50/22,635.60
  6. Step 6: Final answer
    x = 29,182.66

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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.