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Finding the Fourth Proportional to 8,474.18, 11,696.87 and 5,490.20

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Solution

The fourth proportional to 8,474.18, 11,696.87 and 5,490.20 is: 7,578.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,474.18 : 11,696.87 = 5,490.20 : x
  2. Step 2: Convert to fraction form
    8,474.18/11,696.87 = 5,490.20/x
  3. Step 3: Cross multiply
    8,474.18x = 11,696.87 × 5,490.20
  4. Step 4: Simplify right side
    8,474.18x = 64,218,198.64
  5. Step 5: Solve for x
    x = 64,218,198.64/8,474.18
  6. Step 6: Final answer
    x = 7,578.11

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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.