Home / 12,639.75-18,959.56-3,279.76

Finding the Fourth Proportional to 12,639.75, 18,959.56 and 3,279.76

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Solution

The fourth proportional to 12,639.75, 18,959.56 and 3,279.76 is: 4,919.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.75 : 18,959.56 = 3,279.76 : x
  2. Step 2: Convert to fraction form
    12,639.75/18,959.56 = 3,279.76/x
  3. Step 3: Cross multiply
    12,639.75x = 18,959.56 × 3,279.76
  4. Step 4: Simplify right side
    12,639.75x = 62,182,822.01
  5. Step 5: Solve for x
    x = 62,182,822.01/12,639.75
  6. Step 6: Final answer
    x = 4,919.62

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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.