Home / 21,418.77-29,557.94-11,987.34

Finding the Fourth Proportional to 21,418.77, 29,557.94 and 11,987.34

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Solution

The fourth proportional to 21,418.77, 29,557.94 and 11,987.34 is: 16,542.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,418.77 : 29,557.94 = 11,987.34 : x
  2. Step 2: Convert to fraction form
    21,418.77/29,557.94 = 11,987.34/x
  3. Step 3: Cross multiply
    21,418.77x = 29,557.94 × 11,987.34
  4. Step 4: Simplify right side
    21,418.77x = 354,321,076.48
  5. Step 5: Solve for x
    x = 354,321,076.48/21,418.77
  6. Step 6: Final answer
    x = 16,542.55

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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.