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Finding the Fourth Proportional to 18,236.26, 27,343.43 and 7,129.71

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Solution

The fourth proportional to 18,236.26, 27,343.43 and 7,129.71 is: 10,690.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,236.26 : 27,343.43 = 7,129.71 : x
  2. Step 2: Convert to fraction form
    18,236.26/27,343.43 = 7,129.71/x
  3. Step 3: Cross multiply
    18,236.26x = 27,343.43 × 7,129.71
  4. Step 4: Simplify right side
    18,236.26x = 194,950,744.13
  5. Step 5: Solve for x
    x = 194,950,744.13/18,236.26
  6. Step 6: Final answer
    x = 10,690.28

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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.