Home / 18,934.60-28,401.90-7,839.76

Finding the Fourth Proportional to 18,934.60, 28,401.90 and 7,839.76

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Solution

The fourth proportional to 18,934.60, 28,401.90 and 7,839.76 is: 11,759.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,934.60 : 28,401.90 = 7,839.76 : x
  2. Step 2: Convert to fraction form
    18,934.60/28,401.90 = 7,839.76/x
  3. Step 3: Cross multiply
    18,934.60x = 28,401.90 × 7,839.76
  4. Step 4: Simplify right side
    18,934.60x = 222,664,079.54
  5. Step 5: Solve for x
    x = 222,664,079.54/18,934.60
  6. Step 6: Final answer
    x = 11,759.64

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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.