Home / 21,279.75-31,947.89-18,179.67

Finding the Fourth Proportional to 21,279.75, 31,947.89 and 18,179.67

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Solution

The fourth proportional to 21,279.75, 31,947.89 and 18,179.67 is: 27,293.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.75 : 31,947.89 = 18,179.67 : x
  2. Step 2: Convert to fraction form
    21,279.75/31,947.89 = 18,179.67/x
  3. Step 3: Cross multiply
    21,279.75x = 31,947.89 × 18,179.67
  4. Step 4: Simplify right side
    21,279.75x = 580,802,006.50
  5. Step 5: Solve for x
    x = 580,802,006.50/21,279.75
  6. Step 6: Final answer
    x = 27,293.65

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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.