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Finding the Fourth Proportional to 15,181.20, 20,949.96 and 8,466.91

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Solution

The fourth proportional to 15,181.20, 20,949.96 and 8,466.91 is: 11,684.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,181.20 : 20,949.96 = 8,466.91 : x
  2. Step 2: Convert to fraction form
    15,181.20/20,949.96 = 8,466.91/x
  3. Step 3: Cross multiply
    15,181.20x = 20,949.96 × 8,466.91
  4. Step 4: Simplify right side
    15,181.20x = 177,381,425.82
  5. Step 5: Solve for x
    x = 177,381,425.82/15,181.20
  6. Step 6: Final answer
    x = 11,684.28

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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.