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Finding the Fourth Proportional to 31,493.80, 47,175.90 and 15,920.20

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Solution

The fourth proportional to 31,493.80, 47,175.90 and 15,920.20 is: 23,847.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,493.80 : 47,175.90 = 15,920.20 : x
  2. Step 2: Convert to fraction form
    31,493.80/47,175.90 = 15,920.20/x
  3. Step 3: Cross multiply
    31,493.80x = 47,175.90 × 15,920.20
  4. Step 4: Simplify right side
    31,493.80x = 751,049,763.18
  5. Step 5: Solve for x
    x = 751,049,763.18/31,493.80
  6. Step 6: Final answer
    x = 23,847.54

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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.