Home / 28,757.28-43,135.67-7,980.78

Finding the Fourth Proportional to 28,757.28, 43,135.67 and 7,980.78

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Solution

The fourth proportional to 28,757.28, 43,135.67 and 7,980.78 is: 11,971.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,757.28 : 43,135.67 = 7,980.78 : x
  2. Step 2: Convert to fraction form
    28,757.28/43,135.67 = 7,980.78/x
  3. Step 3: Cross multiply
    28,757.28x = 43,135.67 × 7,980.78
  4. Step 4: Simplify right side
    28,757.28x = 344,256,292.42
  5. Step 5: Solve for x
    x = 344,256,292.42/28,757.28
  6. Step 6: Final answer
    x = 11,971.10

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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.