Home / 31,629.20-47,396.80-12,886.32

Finding the Fourth Proportional to 31,629.20, 47,396.80 and 12,886.32

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Solution

The fourth proportional to 31,629.20, 47,396.80 and 12,886.32 is: 19,310.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,629.20 : 47,396.80 = 12,886.32 : x
  2. Step 2: Convert to fraction form
    31,629.20/47,396.80 = 12,886.32/x
  3. Step 3: Cross multiply
    31,629.20x = 47,396.80 × 12,886.32
  4. Step 4: Simplify right side
    31,629.20x = 610,770,331.78
  5. Step 5: Solve for x
    x = 610,770,331.78/31,629.20
  6. Step 6: Final answer
    x = 19,310.33

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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.