Home / 21,188.68-31,788.16-6,396.71

Finding the Fourth Proportional to 21,188.68, 31,788.16 and 6,396.71

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Solution

The fourth proportional to 21,188.68, 31,788.16 and 6,396.71 is: 9,596.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,188.68 : 31,788.16 = 6,396.71 : x
  2. Step 2: Convert to fraction form
    21,188.68/31,788.16 = 6,396.71/x
  3. Step 3: Cross multiply
    21,188.68x = 31,788.16 × 6,396.71
  4. Step 4: Simplify right side
    21,188.68x = 203,339,608.97
  5. Step 5: Solve for x
    x = 203,339,608.97/21,188.68
  6. Step 6: Final answer
    x = 9,596.62

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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.