Home / 40,840.78-61,269.68-12,759.70

Finding the Fourth Proportional to 40,840.78, 61,269.68 and 12,759.70

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Solution

The fourth proportional to 40,840.78, 61,269.68 and 12,759.70 is: 19,142.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,840.78 : 61,269.68 = 12,759.70 : x
  2. Step 2: Convert to fraction form
    40,840.78/61,269.68 = 12,759.70/x
  3. Step 3: Cross multiply
    40,840.78x = 61,269.68 × 12,759.70
  4. Step 4: Simplify right side
    40,840.78x = 781,782,735.90
  5. Step 5: Solve for x
    x = 781,782,735.90/40,840.78
  6. Step 6: Final answer
    x = 19,142.21

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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.