Home / 21,179.60-31,769.40-16,773.20

Finding the Fourth Proportional to 21,179.60, 31,769.40 and 16,773.20

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Solution

The fourth proportional to 21,179.60, 31,769.40 and 16,773.20 is: 25,159.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.60 : 31,769.40 = 16,773.20 : x
  2. Step 2: Convert to fraction form
    21,179.60/31,769.40 = 16,773.20/x
  3. Step 3: Cross multiply
    21,179.60x = 31,769.40 × 16,773.20
  4. Step 4: Simplify right side
    21,179.60x = 532,874,500.08
  5. Step 5: Solve for x
    x = 532,874,500.08/21,179.60
  6. Step 6: Final answer
    x = 25,159.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.