Home / 20,976.64-28,947.96-11,545.39

Finding the Fourth Proportional to 20,976.64, 28,947.96 and 11,545.39

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Solution

The fourth proportional to 20,976.64, 28,947.96 and 11,545.39 is: 15,932.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.64 : 28,947.96 = 11,545.39 : x
  2. Step 2: Convert to fraction form
    20,976.64/28,947.96 = 11,545.39/x
  3. Step 3: Cross multiply
    20,976.64x = 28,947.96 × 11,545.39
  4. Step 4: Simplify right side
    20,976.64x = 334,215,487.90
  5. Step 5: Solve for x
    x = 334,215,487.90/20,976.64
  6. Step 6: Final answer
    x = 15,932.75

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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.