Home / 28,767.20-43,150.80-7,990.70

Finding the Fourth Proportional to 28,767.20, 43,150.80 and 7,990.70

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Solution

The fourth proportional to 28,767.20, 43,150.80 and 7,990.70 is: 11,986.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,767.20 : 43,150.80 = 7,990.70 : x
  2. Step 2: Convert to fraction form
    28,767.20/43,150.80 = 7,990.70/x
  3. Step 3: Cross multiply
    28,767.20x = 43,150.80 × 7,990.70
  4. Step 4: Simplify right side
    28,767.20x = 344,805,097.56
  5. Step 5: Solve for x
    x = 344,805,097.56/28,767.20
  6. Step 6: Final answer
    x = 11,986.05

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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.