Home / 21,073.45-31,609.44-5,278.61

Finding the Fourth Proportional to 21,073.45, 31,609.44 and 5,278.61

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Solution

The fourth proportional to 21,073.45, 31,609.44 and 5,278.61 is: 7,917.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,073.45 : 31,609.44 = 5,278.61 : x
  2. Step 2: Convert to fraction form
    21,073.45/31,609.44 = 5,278.61/x
  3. Step 3: Cross multiply
    21,073.45x = 31,609.44 × 5,278.61
  4. Step 4: Simplify right side
    21,073.45x = 166,854,081.68
  5. Step 5: Solve for x
    x = 166,854,081.68/21,073.45
  6. Step 6: Final answer
    x = 7,917.74

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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.