Home / 21,314.87-31,914.24-15,397.82

Finding the Fourth Proportional to 21,314.87, 31,914.24 and 15,397.82

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Solution

The fourth proportional to 21,314.87, 31,914.24 and 15,397.82 is: 23,054.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,314.87 : 31,914.24 = 15,397.82 : x
  2. Step 2: Convert to fraction form
    21,314.87/31,914.24 = 15,397.82/x
  3. Step 3: Cross multiply
    21,314.87x = 31,914.24 × 15,397.82
  4. Step 4: Simplify right side
    21,314.87x = 491,409,722.96
  5. Step 5: Solve for x
    x = 491,409,722.96/21,314.87
  6. Step 6: Final answer
    x = 23,054.78

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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.