Home / 21,159.85-31,741.89-7,836.43

Finding the Fourth Proportional to 21,159.85, 31,741.89 and 7,836.43

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Solution

The fourth proportional to 21,159.85, 31,741.89 and 7,836.43 is: 11,755.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,159.85 : 31,741.89 = 7,836.43 : x
  2. Step 2: Convert to fraction form
    21,159.85/31,741.89 = 7,836.43/x
  3. Step 3: Cross multiply
    21,159.85x = 31,741.89 × 7,836.43
  4. Step 4: Simplify right side
    21,159.85x = 248,743,099.05
  5. Step 5: Solve for x
    x = 248,743,099.05/21,159.85
  6. Step 6: Final answer
    x = 11,755.43

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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.