Home / 20,479.68-30,728.16-12,175.56

Finding the Fourth Proportional to 20,479.68, 30,728.16 and 12,175.56

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Solution

The fourth proportional to 20,479.68, 30,728.16 and 12,175.56 is: 18,268.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,479.68 : 30,728.16 = 12,175.56 : x
  2. Step 2: Convert to fraction form
    20,479.68/30,728.16 = 12,175.56/x
  3. Step 3: Cross multiply
    20,479.68x = 30,728.16 × 12,175.56
  4. Step 4: Simplify right side
    20,479.68x = 374,132,555.77
  5. Step 5: Solve for x
    x = 374,132,555.77/20,479.68
  6. Step 6: Final answer
    x = 18,268.48

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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.