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Finding the Fourth Proportional to 18,275.62, 25,218.84 and 10,721.16

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Solution

The fourth proportional to 18,275.62, 25,218.84 and 10,721.16 is: 14,794.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,275.62 : 25,218.84 = 10,721.16 : x
  2. Step 2: Convert to fraction form
    18,275.62/25,218.84 = 10,721.16/x
  3. Step 3: Cross multiply
    18,275.62x = 25,218.84 × 10,721.16
  4. Step 4: Simplify right side
    18,275.62x = 270,375,218.65
  5. Step 5: Solve for x
    x = 270,375,218.65/18,275.62
  6. Step 6: Final answer
    x = 14,794.31

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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.