Home / 21,149.31-29,184.79-11,587.29

Finding the Fourth Proportional to 21,149.31, 29,184.79 and 11,587.29

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Solution

The fourth proportional to 21,149.31, 29,184.79 and 11,587.29 is: 15,989.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149.31 : 29,184.79 = 11,587.29 : x
  2. Step 2: Convert to fraction form
    21,149.31/29,184.79 = 11,587.29/x
  3. Step 3: Cross multiply
    21,149.31x = 29,184.79 × 11,587.29
  4. Step 4: Simplify right side
    21,149.31x = 338,172,625.32
  5. Step 5: Solve for x
    x = 338,172,625.32/21,149.31
  6. Step 6: Final answer
    x = 15,989.77

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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.