Home / 21,418.38-29,557.17-11,987.04

Finding the Fourth Proportional to 21,418.38, 29,557.17 and 11,987.04

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Solution

The fourth proportional to 21,418.38, 29,557.17 and 11,987.04 is: 16,542.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,418.38 : 29,557.17 = 11,987.04 : x
  2. Step 2: Convert to fraction form
    21,418.38/29,557.17 = 11,987.04/x
  3. Step 3: Cross multiply
    21,418.38x = 29,557.17 × 11,987.04
  4. Step 4: Simplify right side
    21,418.38x = 354,302,979.08
  5. Step 5: Solve for x
    x = 354,302,979.08/21,418.38
  6. Step 6: Final answer
    x = 16,542.01

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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.