Home / 21,177.80-29,139.54-17,387

Finding the Fourth Proportional to 21,177.80, 29,139.54 and 17,387

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Solution

The fourth proportional to 21,177.80, 29,139.54 and 17,387 is: 23,923.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.80 : 29,139.54 = 17,387 : x
  2. Step 2: Convert to fraction form
    21,177.80/29,139.54 = 17,387/x
  3. Step 3: Cross multiply
    21,177.80x = 29,139.54 × 17,387
  4. Step 4: Simplify right side
    21,177.80x = 506,649,181.98
  5. Step 5: Solve for x
    x = 506,649,181.98/21,177.80
  6. Step 6: Final answer
    x = 23,923.60

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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.