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Finding the Fourth Proportional to 8,859.86, 13,286.67 and 2,618.20

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Solution

The fourth proportional to 8,859.86, 13,286.67 and 2,618.20 is: 3,926.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,859.86 : 13,286.67 = 2,618.20 : x
  2. Step 2: Convert to fraction form
    8,859.86/13,286.67 = 2,618.20/x
  3. Step 3: Cross multiply
    8,859.86x = 13,286.67 × 2,618.20
  4. Step 4: Simplify right side
    8,859.86x = 34,787,159.39
  5. Step 5: Solve for x
    x = 34,787,159.39/8,859.86
  6. Step 6: Final answer
    x = 3,926.38

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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.