Home / 20,976.21-28,947.15-11,545.38

Finding the Fourth Proportional to 20,976.21, 28,947.15 and 11,545.38

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Solution

The fourth proportional to 20,976.21, 28,947.15 and 11,545.38 is: 15,932.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.21 : 28,947.15 = 11,545.38 : x
  2. Step 2: Convert to fraction form
    20,976.21/28,947.15 = 11,545.38/x
  3. Step 3: Cross multiply
    20,976.21x = 28,947.15 × 11,545.38
  4. Step 4: Simplify right side
    20,976.21x = 334,205,846.67
  5. Step 5: Solve for x
    x = 334,205,846.67/20,976.21
  6. Step 6: Final answer
    x = 15,932.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.