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Finding the Fourth Proportional to 9,979.92, 13,772.87 and 5,504.62

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Solution

The fourth proportional to 9,979.92, 13,772.87 and 5,504.62 is: 7,596.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,979.92 : 13,772.87 = 5,504.62 : x
  2. Step 2: Convert to fraction form
    9,979.92/13,772.87 = 5,504.62/x
  3. Step 3: Cross multiply
    9,979.92x = 13,772.87 × 5,504.62
  4. Step 4: Simplify right side
    9,979.92x = 75,814,415.66
  5. Step 5: Solve for x
    x = 75,814,415.66/9,979.92
  6. Step 6: Final answer
    x = 7,596.70

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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.