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Finding the Fourth Proportional to 8,891.78, 13,339.92 and 2,651.78

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Solution

The fourth proportional to 8,891.78, 13,339.92 and 2,651.78 is: 3,978.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,891.78 : 13,339.92 = 2,651.78 : x
  2. Step 2: Convert to fraction form
    8,891.78/13,339.92 = 2,651.78/x
  3. Step 3: Cross multiply
    8,891.78x = 13,339.92 × 2,651.78
  4. Step 4: Simplify right side
    8,891.78x = 35,374,533.06
  5. Step 5: Solve for x
    x = 35,374,533.06/8,891.78
  6. Step 6: Final answer
    x = 3,978.34

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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.