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Finding the Fourth Proportional to 18,515.65, 27,773.33 and 7,422.17

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Solution

The fourth proportional to 18,515.65, 27,773.33 and 7,422.17 is: 11,133.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.65 : 27,773.33 = 7,422.17 : x
  2. Step 2: Convert to fraction form
    18,515.65/27,773.33 = 7,422.17/x
  3. Step 3: Cross multiply
    18,515.65x = 27,773.33 × 7,422.17
  4. Step 4: Simplify right side
    18,515.65x = 206,138,376.73
  5. Step 5: Solve for x
    x = 206,138,376.73/18,515.65
  6. Step 6: Final answer
    x = 11,133.20

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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.