Home / 20,707.20-31,067.16-12,396.60

Finding the Fourth Proportional to 20,707.20, 31,067.16 and 12,396.60

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Solution

The fourth proportional to 20,707.20, 31,067.16 and 12,396.60 is: 18,598.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,707.20 : 31,067.16 = 12,396.60 : x
  2. Step 2: Convert to fraction form
    20,707.20/31,067.16 = 12,396.60/x
  3. Step 3: Cross multiply
    20,707.20x = 31,067.16 × 12,396.60
  4. Step 4: Simplify right side
    20,707.20x = 385,127,155.66
  5. Step 5: Solve for x
    x = 385,127,155.66/20,707.20
  6. Step 6: Final answer
    x = 18,598.71

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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.