Home / 21,310.55-31,985.52-10,787.96

Finding the Fourth Proportional to 21,310.55, 31,985.52 and 10,787.96

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Solution

The fourth proportional to 21,310.55, 31,985.52 and 10,787.96 is: 16,191.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.55 : 31,985.52 = 10,787.96 : x
  2. Step 2: Convert to fraction form
    21,310.55/31,985.52 = 10,787.96/x
  3. Step 3: Cross multiply
    21,310.55x = 31,985.52 × 10,787.96
  4. Step 4: Simplify right side
    21,310.55x = 345,058,350.41
  5. Step 5: Solve for x
    x = 345,058,350.41/21,310.55
  6. Step 6: Final answer
    x = 16,191.90

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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.