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Finding the Fourth Proportional to 18,811.20, 27,123.12 and 18,811.20

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Solution

The fourth proportional to 18,811.20, 27,123.12 and 18,811.20 is: 27,123.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,811.20 : 27,123.12 = 18,811.20 : x
  2. Step 2: Convert to fraction form
    18,811.20/27,123.12 = 18,811.20/x
  3. Step 3: Cross multiply
    18,811.20x = 27,123.12 × 18,811.20
  4. Step 4: Simplify right side
    18,811.20x = 510,218,434.94
  5. Step 5: Solve for x
    x = 510,218,434.94/18,811.20
  6. Step 6: Final answer
    x = 27,123.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.