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Finding the Fourth Proportional to 18,449.20, 27,673.80 and 12,908.80

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Solution

The fourth proportional to 18,449.20, 27,673.80 and 12,908.80 is: 19,363.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,449.20 : 27,673.80 = 12,908.80 : x
  2. Step 2: Convert to fraction form
    18,449.20/27,673.80 = 12,908.80/x
  3. Step 3: Cross multiply
    18,449.20x = 27,673.80 × 12,908.80
  4. Step 4: Simplify right side
    18,449.20x = 357,235,549.44
  5. Step 5: Solve for x
    x = 357,235,549.44/18,449.20
  6. Step 6: Final answer
    x = 19,363.20

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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.