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Finding the Fourth Proportional to 18,412.40, 27,640.20 and 18,282.80

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Solution

The fourth proportional to 18,412.40, 27,640.20 and 18,282.80 is: 27,445.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,412.40 : 27,640.20 = 18,282.80 : x
  2. Step 2: Convert to fraction form
    18,412.40/27,640.20 = 18,282.80/x
  3. Step 3: Cross multiply
    18,412.40x = 27,640.20 × 18,282.80
  4. Step 4: Simplify right side
    18,412.40x = 505,340,248.56
  5. Step 5: Solve for x
    x = 505,340,248.56/18,412.40
  6. Step 6: Final answer
    x = 27,445.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.