Home / 12,640.35-18,960.46-3,279.58

Finding the Fourth Proportional to 12,640.35, 18,960.46 and 3,279.58

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Solution

The fourth proportional to 12,640.35, 18,960.46 and 3,279.58 is: 4,919.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.35 : 18,960.46 = 3,279.58 : x
  2. Step 2: Convert to fraction form
    12,640.35/18,960.46 = 3,279.58/x
  3. Step 3: Cross multiply
    12,640.35x = 18,960.46 × 3,279.58
  4. Step 4: Simplify right side
    12,640.35x = 62,182,345.41
  5. Step 5: Solve for x
    x = 62,182,345.41/12,640.35
  6. Step 6: Final answer
    x = 4,919.35

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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.