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Finding the Fourth Proportional to 18,578.02, 27,876.14 and 8,718.10

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Solution

The fourth proportional to 18,578.02, 27,876.14 and 8,718.10 is: 13,081.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,578.02 : 27,876.14 = 8,718.10 : x
  2. Step 2: Convert to fraction form
    18,578.02/27,876.14 = 8,718.10/x
  3. Step 3: Cross multiply
    18,578.02x = 27,876.14 × 8,718.10
  4. Step 4: Simplify right side
    18,578.02x = 243,026,976.13
  5. Step 5: Solve for x
    x = 243,026,976.13/18,578.02
  6. Step 6: Final answer
    x = 13,081.43

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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.