Home / 21,118.24-29,148.42-13,169.71

Finding the Fourth Proportional to 21,118.24, 29,148.42 and 13,169.71

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Solution

The fourth proportional to 21,118.24, 29,148.42 and 13,169.71 is: 18,177.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.24 : 29,148.42 = 13,169.71 : x
  2. Step 2: Convert to fraction form
    21,118.24/29,148.42 = 13,169.71/x
  3. Step 3: Cross multiply
    21,118.24x = 29,148.42 × 13,169.71
  4. Step 4: Simplify right side
    21,118.24x = 383,876,238.36
  5. Step 5: Solve for x
    x = 383,876,238.36/21,118.24
  6. Step 6: Final answer
    x = 18,177.47

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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.