Home / 21,279.92-31,919.82-6,488.96

Finding the Fourth Proportional to 21,279.92, 31,919.82 and 6,488.96

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Solution

The fourth proportional to 21,279.92, 31,919.82 and 6,488.96 is: 9,733.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.92 : 31,919.82 = 6,488.96 : x
  2. Step 2: Convert to fraction form
    21,279.92/31,919.82 = 6,488.96/x
  3. Step 3: Cross multiply
    21,279.92x = 31,919.82 × 6,488.96
  4. Step 4: Simplify right side
    21,279.92x = 207,126,435.19
  5. Step 5: Solve for x
    x = 207,126,435.19/21,279.92
  6. Step 6: Final answer
    x = 9,733.42

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1.5x scale

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.