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Finding the Fourth Proportional to 11,486.32, 15,849.78 and 6,449.44

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Solution

The fourth proportional to 11,486.32, 15,849.78 and 6,449.44 is: 8,899.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,486.32 : 15,849.78 = 6,449.44 : x
  2. Step 2: Convert to fraction form
    11,486.32/15,849.78 = 6,449.44/x
  3. Step 3: Cross multiply
    11,486.32x = 15,849.78 × 6,449.44
  4. Step 4: Simplify right side
    11,486.32x = 102,222,205.12
  5. Step 5: Solve for x
    x = 102,222,205.12/11,486.32
  6. Step 6: Final answer
    x = 8,899.47

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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.