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Finding the Fourth Proportional to 18,079.20, 27,123.12 and 12,895.20

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Solution

The fourth proportional to 18,079.20, 27,123.12 and 12,895.20 is: 19,345.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,079.20 : 27,123.12 = 12,895.20 : x
  2. Step 2: Convert to fraction form
    18,079.20/27,123.12 = 12,895.20/x
  3. Step 3: Cross multiply
    18,079.20x = 27,123.12 × 12,895.20
  4. Step 4: Simplify right side
    18,079.20x = 349,758,057.02
  5. Step 5: Solve for x
    x = 349,758,057.02/18,079.20
  6. Step 6: Final answer
    x = 19,345.88

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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.