Home / 39,418.91-54,398.25-21,514.31

Finding the Fourth Proportional to 39,418.91, 54,398.25 and 21,514.31

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Solution

The fourth proportional to 39,418.91, 54,398.25 and 21,514.31 is: 29,689.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,418.91 : 54,398.25 = 21,514.31 : x
  2. Step 2: Convert to fraction form
    39,418.91/54,398.25 = 21,514.31/x
  3. Step 3: Cross multiply
    39,418.91x = 54,398.25 × 21,514.31
  4. Step 4: Simplify right side
    39,418.91x = 1,170,340,949.95
  5. Step 5: Solve for x
    x = 1,170,340,949.95/39,418.91
  6. Step 6: Final answer
    x = 29,689.83

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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.