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Finding the Fourth Proportional to 18,236.29, 27,343.48 and 7,129.75

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Solution

The fourth proportional to 18,236.29, 27,343.48 and 7,129.75 is: 10,690.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,236.29 : 27,343.48 = 7,129.75 : x
  2. Step 2: Convert to fraction form
    18,236.29/27,343.48 = 7,129.75/x
  3. Step 3: Cross multiply
    18,236.29x = 27,343.48 × 7,129.75
  4. Step 4: Simplify right side
    18,236.29x = 194,952,176.53
  5. Step 5: Solve for x
    x = 194,952,176.53/18,236.29
  6. Step 6: Final answer
    x = 10,690.34

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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.