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Finding the Fourth Proportional to 31,640.22, 47,458.71 and 9,453.78

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Solution

The fourth proportional to 31,640.22, 47,458.71 and 9,453.78 is: 14,180.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,640.22 : 47,458.71 = 9,453.78 : x
  2. Step 2: Convert to fraction form
    31,640.22/47,458.71 = 9,453.78/x
  3. Step 3: Cross multiply
    31,640.22x = 47,458.71 × 9,453.78
  4. Step 4: Simplify right side
    31,640.22x = 448,664,203.42
  5. Step 5: Solve for x
    x = 448,664,203.42/31,640.22
  6. Step 6: Final answer
    x = 14,180.19

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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.