Home / 40,839.78-61,268.18-12,758.70

Finding the Fourth Proportional to 40,839.78, 61,268.18 and 12,758.70

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Solution

The fourth proportional to 40,839.78, 61,268.18 and 12,758.70 is: 19,140.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,839.78 : 61,268.18 = 12,758.70 : x
  2. Step 2: Convert to fraction form
    40,839.78/61,268.18 = 12,758.70/x
  3. Step 3: Cross multiply
    40,839.78x = 61,268.18 × 12,758.70
  4. Step 4: Simplify right side
    40,839.78x = 781,702,541.97
  5. Step 5: Solve for x
    x = 781,702,541.97/40,839.78
  6. Step 6: Final answer
    x = 19,140.71

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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.