Home / 21,257.88-31,890.68-8,770.97

Finding the Fourth Proportional to 21,257.88, 31,890.68 and 8,770.97

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Solution

The fourth proportional to 21,257.88, 31,890.68 and 8,770.97 is: 13,158.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,257.88 : 31,890.68 = 8,770.97 : x
  2. Step 2: Convert to fraction form
    21,257.88/31,890.68 = 8,770.97/x
  3. Step 3: Cross multiply
    21,257.88x = 31,890.68 × 8,770.97
  4. Step 4: Simplify right side
    21,257.88x = 279,711,994.25
  5. Step 5: Solve for x
    x = 279,711,994.25/21,257.88
  6. Step 6: Final answer
    x = 13,158.04

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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.