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Finding the Fourth Proportional to 18,648.15, 27,972.29 and 7,555.05

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Solution

The fourth proportional to 18,648.15, 27,972.29 and 7,555.05 is: 11,332.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,648.15 : 27,972.29 = 7,555.05 : x
  2. Step 2: Convert to fraction form
    18,648.15/27,972.29 = 7,555.05/x
  3. Step 3: Cross multiply
    18,648.15x = 27,972.29 × 7,555.05
  4. Step 4: Simplify right side
    18,648.15x = 211,332,049.56
  5. Step 5: Solve for x
    x = 211,332,049.56/18,648.15
  6. Step 6: Final answer
    x = 11,332.60

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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.