Home / 21,242.96-31,845.80-8,086.58

Finding the Fourth Proportional to 21,242.96, 31,845.80 and 8,086.58

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Solution

The fourth proportional to 21,242.96, 31,845.80 and 8,086.58 is: 12,122.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,242.96 : 31,845.80 = 8,086.58 : x
  2. Step 2: Convert to fraction form
    21,242.96/31,845.80 = 8,086.58/x
  3. Step 3: Cross multiply
    21,242.96x = 31,845.80 × 8,086.58
  4. Step 4: Simplify right side
    21,242.96x = 257,523,450.14
  5. Step 5: Solve for x
    x = 257,523,450.14/21,242.96
  6. Step 6: Final answer
    x = 12,122.77

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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.