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Finding the Fourth Proportional to 8,118.64, 12,178.42 and 2,275.71

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Solution

The fourth proportional to 8,118.64, 12,178.42 and 2,275.71 is: 3,413.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,118.64 : 12,178.42 = 2,275.71 : x
  2. Step 2: Convert to fraction form
    8,118.64/12,178.42 = 2,275.71/x
  3. Step 3: Cross multiply
    8,118.64x = 12,178.42 × 2,275.71
  4. Step 4: Simplify right side
    8,118.64x = 27,714,552.18
  5. Step 5: Solve for x
    x = 27,714,552.18/8,118.64
  6. Step 6: Final answer
    x = 3,413.69

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1.5x scale

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.