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Finding the Fourth Proportional to 31,479.52, 47,211.72 and 9,286.88

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Solution

The fourth proportional to 31,479.52, 47,211.72 and 9,286.88 is: 13,928.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,479.52 : 47,211.72 = 9,286.88 : x
  2. Step 2: Convert to fraction form
    31,479.52/47,211.72 = 9,286.88/x
  3. Step 3: Cross multiply
    31,479.52x = 47,211.72 × 9,286.88
  4. Step 4: Simplify right side
    31,479.52x = 438,449,578.23
  5. Step 5: Solve for x
    x = 438,449,578.23/31,479.52
  6. Step 6: Final answer
    x = 13,928.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.