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Finding the Fourth Proportional to 18,386.32, 27,583.80 and 5,238.88

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Solution

The fourth proportional to 18,386.32, 27,583.80 and 5,238.88 is: 7,859.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,386.32 : 27,583.80 = 5,238.88 : x
  2. Step 2: Convert to fraction form
    18,386.32/27,583.80 = 5,238.88/x
  3. Step 3: Cross multiply
    18,386.32x = 27,583.80 × 5,238.88
  4. Step 4: Simplify right side
    18,386.32x = 144,508,218.14
  5. Step 5: Solve for x
    x = 144,508,218.14/18,386.32
  6. Step 6: Final answer
    x = 7,859.55

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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.