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Finding the Fourth Proportional to 9,479.16, 13,079.94 and 5,286.60

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Solution

The fourth proportional to 9,479.16, 13,079.94 and 5,286.60 is: 7,294.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,479.16 : 13,079.94 = 5,286.60 : x
  2. Step 2: Convert to fraction form
    9,479.16/13,079.94 = 5,286.60/x
  3. Step 3: Cross multiply
    9,479.16x = 13,079.94 × 5,286.60
  4. Step 4: Simplify right side
    9,479.16x = 69,148,410.80
  5. Step 5: Solve for x
    x = 69,148,410.80/9,479.16
  6. Step 6: Final answer
    x = 7,294.78

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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.