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Finding the Fourth Proportional to 22,479.70, 31,029.11 and 13,976.80

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Solution

The fourth proportional to 22,479.70, 31,029.11 and 13,976.80 is: 19,292.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,479.70 : 31,029.11 = 13,976.80 : x
  2. Step 2: Convert to fraction form
    22,479.70/31,029.11 = 13,976.80/x
  3. Step 3: Cross multiply
    22,479.70x = 31,029.11 × 13,976.80
  4. Step 4: Simplify right side
    22,479.70x = 433,687,664.65
  5. Step 5: Solve for x
    x = 433,687,664.65/22,479.70
  6. Step 6: Final answer
    x = 19,292.41

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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.