Home / 28,753.85-39,669.30-21,218.18

Finding the Fourth Proportional to 28,753.85, 39,669.30 and 21,218.18

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Solution

The fourth proportional to 28,753.85, 39,669.30 and 21,218.18 is: 29,272.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,753.85 : 39,669.30 = 21,218.18 : x
  2. Step 2: Convert to fraction form
    28,753.85/39,669.30 = 21,218.18/x
  3. Step 3: Cross multiply
    28,753.85x = 39,669.30 × 21,218.18
  4. Step 4: Simplify right side
    28,753.85x = 841,710,149.53
  5. Step 5: Solve for x
    x = 841,710,149.53/28,753.85
  6. Step 6: Final answer
    x = 29,272.95

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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.