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Finding the Fourth Proportional to 11,275.31, 15,550.48 and 8,449.31

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Solution

The fourth proportional to 11,275.31, 15,550.48 and 8,449.31 is: 11,652.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,275.31 : 15,550.48 = 8,449.31 : x
  2. Step 2: Convert to fraction form
    11,275.31/15,550.48 = 8,449.31/x
  3. Step 3: Cross multiply
    11,275.31x = 15,550.48 × 8,449.31
  4. Step 4: Simplify right side
    11,275.31x = 131,390,826.17
  5. Step 5: Solve for x
    x = 131,390,826.17/11,275.31
  6. Step 6: Final answer
    x = 11,652.97

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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.