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Finding the Fourth Proportional to 18,219.80, 27,329.70 and 9,471.80

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Solution

The fourth proportional to 18,219.80, 27,329.70 and 9,471.80 is: 14,207.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,219.80 : 27,329.70 = 9,471.80 : x
  2. Step 2: Convert to fraction form
    18,219.80/27,329.70 = 9,471.80/x
  3. Step 3: Cross multiply
    18,219.80x = 27,329.70 × 9,471.80
  4. Step 4: Simplify right side
    18,219.80x = 258,861,452.46
  5. Step 5: Solve for x
    x = 258,861,452.46/18,219.80
  6. Step 6: Final answer
    x = 14,207.70

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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.