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Finding the Fourth Proportional to 18,585.81, 27,869.13 and 7,489.51

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Solution

The fourth proportional to 18,585.81, 27,869.13 and 7,489.51 is: 11,230.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,585.81 : 27,869.13 = 7,489.51 : x
  2. Step 2: Convert to fraction form
    18,585.81/27,869.13 = 7,489.51/x
  3. Step 3: Cross multiply
    18,585.81x = 27,869.13 × 7,489.51
  4. Step 4: Simplify right side
    18,585.81x = 208,726,058.15
  5. Step 5: Solve for x
    x = 208,726,058.15/18,585.81
  6. Step 6: Final answer
    x = 11,230.40

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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.