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Finding the Fourth Proportional to 18,398.53, 27,598.29 and 5,919.81

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Solution

The fourth proportional to 18,398.53, 27,598.29 and 5,919.81 is: 8,879.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,398.53 : 27,598.29 = 5,919.81 : x
  2. Step 2: Convert to fraction form
    18,398.53/27,598.29 = 5,919.81/x
  3. Step 3: Cross multiply
    18,398.53x = 27,598.29 × 5,919.81
  4. Step 4: Simplify right side
    18,398.53x = 163,376,633.12
  5. Step 5: Solve for x
    x = 163,376,633.12/18,398.53
  6. Step 6: Final answer
    x = 8,879.87

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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.