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Finding the Fourth Proportional to 18,388.56, 27,574.65 and 5,237.82

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Solution

The fourth proportional to 18,388.56, 27,574.65 and 5,237.82 is: 7,854.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,388.56 : 27,574.65 = 5,237.82 : x
  2. Step 2: Convert to fraction form
    18,388.56/27,574.65 = 5,237.82/x
  3. Step 3: Cross multiply
    18,388.56x = 27,574.65 × 5,237.82
  4. Step 4: Simplify right side
    18,388.56x = 144,431,053.26
  5. Step 5: Solve for x
    x = 144,431,053.26/18,388.56
  6. Step 6: Final answer
    x = 7,854.40

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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.