Home / 21,340.80-31,985.24-15,102.62

Finding the Fourth Proportional to 21,340.80, 31,985.24 and 15,102.62

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Solution

The fourth proportional to 21,340.80, 31,985.24 and 15,102.62 is: 22,635.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,340.80 : 31,985.24 = 15,102.62 : x
  2. Step 2: Convert to fraction form
    21,340.80/31,985.24 = 15,102.62/x
  3. Step 3: Cross multiply
    21,340.80x = 31,985.24 × 15,102.62
  4. Step 4: Simplify right side
    21,340.80x = 483,060,689.89
  5. Step 5: Solve for x
    x = 483,060,689.89/21,340.80
  6. Step 6: Final answer
    x = 22,635.55

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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.