Home / 18,121.32-27,279.99-12,963.24

Finding the Fourth Proportional to 18,121.32, 27,279.99 and 12,963.24

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Solution

The fourth proportional to 18,121.32, 27,279.99 and 12,963.24 is: 19,514.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,121.32 : 27,279.99 = 12,963.24 : x
  2. Step 2: Convert to fraction form
    18,121.32/27,279.99 = 12,963.24/x
  3. Step 3: Cross multiply
    18,121.32x = 27,279.99 × 12,963.24
  4. Step 4: Simplify right side
    18,121.32x = 353,637,057.57
  5. Step 5: Solve for x
    x = 353,637,057.57/18,121.32
  6. Step 6: Final answer
    x = 19,514.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.