Home / 20,976.87-28,948.32-11,545.50

Finding the Fourth Proportional to 20,976.87, 28,948.32 and 11,545.50

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Solution

The fourth proportional to 20,976.87, 28,948.32 and 11,545.50 is: 15,932.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.87 : 28,948.32 = 11,545.50 : x
  2. Step 2: Convert to fraction form
    20,976.87/28,948.32 = 11,545.50/x
  3. Step 3: Cross multiply
    20,976.87x = 28,948.32 × 11,545.50
  4. Step 4: Simplify right side
    20,976.87x = 334,222,828.56
  5. Step 5: Solve for x
    x = 334,222,828.56/20,976.87
  6. Step 6: Final answer
    x = 15,932.92

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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.