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Finding the Fourth Proportional to 18,663, 27,995.04 and 4,812

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Solution

The fourth proportional to 18,663, 27,995.04 and 4,812 is: 7,218.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,663 : 27,995.04 = 4,812 : x
  2. Step 2: Convert to fraction form
    18,663/27,995.04 = 4,812/x
  3. Step 3: Cross multiply
    18,663x = 27,995.04 × 4,812
  4. Step 4: Simplify right side
    18,663x = 134,712,132.48
  5. Step 5: Solve for x
    x = 134,712,132.48/18,663
  6. Step 6: Final answer
    x = 7,218.14

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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.