Home / 12,920.11-19,377.64-3,557.73

Finding the Fourth Proportional to 12,920.11, 19,377.64 and 3,557.73

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Solution

The fourth proportional to 12,920.11, 19,377.64 and 3,557.73 is: 5,335.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,920.11 : 19,377.64 = 3,557.73 : x
  2. Step 2: Convert to fraction form
    12,920.11/19,377.64 = 3,557.73/x
  3. Step 3: Cross multiply
    12,920.11x = 19,377.64 × 3,557.73
  4. Step 4: Simplify right side
    12,920.11x = 68,940,411.16
  5. Step 5: Solve for x
    x = 68,940,411.16/12,920.11
  6. Step 6: Final answer
    x = 5,335.90

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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.