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Finding the Fourth Proportional to 8,470.78, 11,687.14 and 5,481.88

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Solution

The fourth proportional to 8,470.78, 11,687.14 and 5,481.88 is: 7,563.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,470.78 : 11,687.14 = 5,481.88 : x
  2. Step 2: Convert to fraction form
    8,470.78/11,687.14 = 5,481.88/x
  3. Step 3: Cross multiply
    8,470.78x = 11,687.14 × 5,481.88
  4. Step 4: Simplify right side
    8,470.78x = 64,067,499.02
  5. Step 5: Solve for x
    x = 64,067,499.02/8,470.78
  6. Step 6: Final answer
    x = 7,563.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.