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Finding the Fourth Proportional to 18,251.68, 27,388.32 and 7,721.12

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Solution

The fourth proportional to 18,251.68, 27,388.32 and 7,721.12 is: 11,586.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,251.68 : 27,388.32 = 7,721.12 : x
  2. Step 2: Convert to fraction form
    18,251.68/27,388.32 = 7,721.12/x
  3. Step 3: Cross multiply
    18,251.68x = 27,388.32 × 7,721.12
  4. Step 4: Simplify right side
    18,251.68x = 211,468,505.32
  5. Step 5: Solve for x
    x = 211,468,505.32/18,251.68
  6. Step 6: Final answer
    x = 11,586.25

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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.