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Finding the Fourth Proportional to 8,556.59, 12,778.59 and 7,388.97

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Solution

The fourth proportional to 8,556.59, 12,778.59 and 7,388.97 is: 11,034.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,556.59 : 12,778.59 = 7,388.97 : x
  2. Step 2: Convert to fraction form
    8,556.59/12,778.59 = 7,388.97/x
  3. Step 3: Cross multiply
    8,556.59x = 12,778.59 × 7,388.97
  4. Step 4: Simplify right side
    8,556.59x = 94,420,618.15
  5. Step 5: Solve for x
    x = 94,420,618.15/8,556.59
  6. Step 6: Final answer
    x = 11,034.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.