Home / 28,718.85-43,080.33-7,658.78

Finding the Fourth Proportional to 28,718.85, 43,080.33 and 7,658.78

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Solution

The fourth proportional to 28,718.85, 43,080.33 and 7,658.78 is: 11,488.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,718.85 : 43,080.33 = 7,658.78 : x
  2. Step 2: Convert to fraction form
    28,718.85/43,080.33 = 7,658.78/x
  3. Step 3: Cross multiply
    28,718.85x = 43,080.33 × 7,658.78
  4. Step 4: Simplify right side
    28,718.85x = 329,942,769.80
  5. Step 5: Solve for x
    x = 329,942,769.80/28,718.85
  6. Step 6: Final answer
    x = 11,488.72

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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.