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Finding the Fourth Proportional to 18,628.80, 27,943.20 and 14,254.80

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Solution

The fourth proportional to 18,628.80, 27,943.20 and 14,254.80 is: 21,382.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,628.80 : 27,943.20 = 14,254.80 : x
  2. Step 2: Convert to fraction form
    18,628.80/27,943.20 = 14,254.80/x
  3. Step 3: Cross multiply
    18,628.80x = 27,943.20 × 14,254.80
  4. Step 4: Simplify right side
    18,628.80x = 398,324,727.36
  5. Step 5: Solve for x
    x = 398,324,727.36/18,628.80
  6. Step 6: Final answer
    x = 21,382.20

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Similar ratio
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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.