Home / 21,391.38-29,521.02-11,959.86

Finding the Fourth Proportional to 21,391.38, 29,521.02 and 11,959.86

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Solution

The fourth proportional to 21,391.38, 29,521.02 and 11,959.86 is: 16,505.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.38 : 29,521.02 = 11,959.86 : x
  2. Step 2: Convert to fraction form
    21,391.38/29,521.02 = 11,959.86/x
  3. Step 3: Cross multiply
    21,391.38x = 29,521.02 × 11,959.86
  4. Step 4: Simplify right side
    21,391.38x = 353,067,266.26
  5. Step 5: Solve for x
    x = 353,067,266.26/21,391.38
  6. Step 6: Final answer
    x = 16,505.12

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1.5x scale

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.