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Finding the Fourth Proportional to 18,315.61, 27,454.89 and 7,217.98

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Solution

The fourth proportional to 18,315.61, 27,454.89 and 7,217.98 is: 10,819.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,315.61 : 27,454.89 = 7,217.98 : x
  2. Step 2: Convert to fraction form
    18,315.61/27,454.89 = 7,217.98/x
  3. Step 3: Cross multiply
    18,315.61x = 27,454.89 × 7,217.98
  4. Step 4: Simplify right side
    18,315.61x = 198,168,709.65
  5. Step 5: Solve for x
    x = 198,168,709.65/18,315.61
  6. Step 6: Final answer
    x = 10,819.66

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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.