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Finding the Fourth Proportional to 18,315.12, 27,454.12 and 7,217.48

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Solution

The fourth proportional to 18,315.12, 27,454.12 and 7,217.48 is: 10,818.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,315.12 : 27,454.12 = 7,217.48 : x
  2. Step 2: Convert to fraction form
    18,315.12/27,454.12 = 7,217.48/x
  3. Step 3: Cross multiply
    18,315.12x = 27,454.12 × 7,217.48
  4. Step 4: Simplify right side
    18,315.12x = 198,149,562.02
  5. Step 5: Solve for x
    x = 198,149,562.02/18,315.12
  6. Step 6: Final answer
    x = 10,818.91

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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.