Home / 20,976.22-28,947.27-11,545.12

Finding the Fourth Proportional to 20,976.22, 28,947.27 and 11,545.12

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Solution

The fourth proportional to 20,976.22, 28,947.27 and 11,545.12 is: 15,932.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.22 : 28,947.27 = 11,545.12 : x
  2. Step 2: Convert to fraction form
    20,976.22/28,947.27 = 11,545.12/x
  3. Step 3: Cross multiply
    20,976.22x = 28,947.27 × 11,545.12
  4. Step 4: Simplify right side
    20,976.22x = 334,199,705.82
  5. Step 5: Solve for x
    x = 334,199,705.82/20,976.22
  6. Step 6: Final answer
    x = 15,932.31

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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.