Home / 21,418.97-29,557.17-11,986.92

Finding the Fourth Proportional to 21,418.97, 29,557.17 and 11,986.92

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Solution

The fourth proportional to 21,418.97, 29,557.17 and 11,986.92 is: 16,541.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,418.97 : 29,557.17 = 11,986.92 : x
  2. Step 2: Convert to fraction form
    21,418.97/29,557.17 = 11,986.92/x
  3. Step 3: Cross multiply
    21,418.97x = 29,557.17 × 11,986.92
  4. Step 4: Simplify right side
    21,418.97x = 354,299,432.22
  5. Step 5: Solve for x
    x = 354,299,432.22/21,418.97
  6. Step 6: Final answer
    x = 16,541.39

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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.