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Finding the Fourth Proportional to 8,815.16, 12,163 and 5,087

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Solution

The fourth proportional to 8,815.16, 12,163 and 5,087 is: 7,018.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,815.16 : 12,163 = 5,087 : x
  2. Step 2: Convert to fraction form
    8,815.16/12,163 = 5,087/x
  3. Step 3: Cross multiply
    8,815.16x = 12,163 × 5,087
  4. Step 4: Simplify right side
    8,815.16x = 61,873,181
  5. Step 5: Solve for x
    x = 61,873,181/8,815.16
  6. Step 6: Final answer
    x = 7,018.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.