Home / 40,731.79-61,107.25-12,650.39

Finding the Fourth Proportional to 40,731.79, 61,107.25 and 12,650.39

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Solution

The fourth proportional to 40,731.79, 61,107.25 and 12,650.39 is: 18,978.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,731.79 : 61,107.25 = 12,650.39 : x
  2. Step 2: Convert to fraction form
    40,731.79/61,107.25 = 12,650.39/x
  3. Step 3: Cross multiply
    40,731.79x = 61,107.25 × 12,650.39
  4. Step 4: Simplify right side
    40,731.79x = 773,030,481.08
  5. Step 5: Solve for x
    x = 773,030,481.08/40,731.79
  6. Step 6: Final answer
    x = 18,978.55

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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.