Home / 20,100.87-30,151.55-13,859.20

Finding the Fourth Proportional to 20,100.87, 30,151.55 and 13,859.20

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Solution

The fourth proportional to 20,100.87, 30,151.55 and 13,859.20 is: 20,788.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,100.87 : 30,151.55 = 13,859.20 : x
  2. Step 2: Convert to fraction form
    20,100.87/30,151.55 = 13,859.20/x
  3. Step 3: Cross multiply
    20,100.87x = 30,151.55 × 13,859.20
  4. Step 4: Simplify right side
    20,100.87x = 417,876,361.76
  5. Step 5: Solve for x
    x = 417,876,361.76/20,100.87
  6. Step 6: Final answer
    x = 20,788.97

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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.