Home / 40,759.20-61,147.60-12,678.72

Finding the Fourth Proportional to 40,759.20, 61,147.60 and 12,678.72

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Solution

The fourth proportional to 40,759.20, 61,147.60 and 12,678.72 is: 19,020.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,759.20 : 61,147.60 = 12,678.72 : x
  2. Step 2: Convert to fraction form
    40,759.20/61,147.60 = 12,678.72/x
  3. Step 3: Cross multiply
    40,759.20x = 61,147.60 × 12,678.72
  4. Step 4: Simplify right side
    40,759.20x = 775,273,299.07
  5. Step 5: Solve for x
    x = 775,273,299.07/40,759.20
  6. Step 6: Final answer
    x = 19,020.82

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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.