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Finding the Fourth Proportional to 18,392.74, 25,375.14 and 11,220.18

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Solution

The fourth proportional to 18,392.74, 25,375.14 and 11,220.18 is: 15,479.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,392.74 : 25,375.14 = 11,220.18 : x
  2. Step 2: Convert to fraction form
    18,392.74/25,375.14 = 11,220.18/x
  3. Step 3: Cross multiply
    18,392.74x = 25,375.14 × 11,220.18
  4. Step 4: Simplify right side
    18,392.74x = 284,713,638.33
  5. Step 5: Solve for x
    x = 284,713,638.33/18,392.74
  6. Step 6: Final answer
    x = 15,479.68

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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.