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Finding the Fourth Proportional to 18,187.78, 27,281.59 and 5,040.11

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Solution

The fourth proportional to 18,187.78, 27,281.59 and 5,040.11 is: 7,560.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,187.78 : 27,281.59 = 5,040.11 : x
  2. Step 2: Convert to fraction form
    18,187.78/27,281.59 = 5,040.11/x
  3. Step 3: Cross multiply
    18,187.78x = 27,281.59 × 5,040.11
  4. Step 4: Simplify right side
    18,187.78x = 137,502,214.57
  5. Step 5: Solve for x
    x = 137,502,214.57/18,187.78
  6. Step 6: Final answer
    x = 7,560.14

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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.