Home / 21,716.62-29,963.76-13,218.65

Finding the Fourth Proportional to 21,716.62, 29,963.76 and 13,218.65

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Solution

The fourth proportional to 21,716.62, 29,963.76 and 13,218.65 is: 18,238.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,716.62 : 29,963.76 = 13,218.65 : x
  2. Step 2: Convert to fraction form
    21,716.62/29,963.76 = 13,218.65/x
  3. Step 3: Cross multiply
    21,716.62x = 29,963.76 × 13,218.65
  4. Step 4: Simplify right side
    21,716.62x = 396,080,306.31
  5. Step 5: Solve for x
    x = 396,080,306.31/21,716.62
  6. Step 6: Final answer
    x = 18,238.58

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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.