Home / 8,118.16-12,178.19-3,187.16

Finding the Fourth Proportional to 8,118.16, 12,178.19 and 3,187.16

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Solution

The fourth proportional to 8,118.16, 12,178.19 and 3,187.16 is: 4,781.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,118.16 : 12,178.19 = 3,187.16 : x
  2. Step 2: Convert to fraction form
    8,118.16/12,178.19 = 3,187.16/x
  3. Step 3: Cross multiply
    8,118.16x = 12,178.19 × 3,187.16
  4. Step 4: Simplify right side
    8,118.16x = 38,813,832.79
  5. Step 5: Solve for x
    x = 38,813,832.79/8,118.16
  6. Step 6: Final answer
    x = 4,781.11

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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.