Home / 21,104.86-31,661.97-7,957.35

Finding the Fourth Proportional to 21,104.86, 31,661.97 and 7,957.35

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Solution

The fourth proportional to 21,104.86, 31,661.97 and 7,957.35 is: 11,937.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,104.86 : 31,661.97 = 7,957.35 : x
  2. Step 2: Convert to fraction form
    21,104.86/31,661.97 = 7,957.35/x
  3. Step 3: Cross multiply
    21,104.86x = 31,661.97 × 7,957.35
  4. Step 4: Simplify right side
    21,104.86x = 251,945,376.98
  5. Step 5: Solve for x
    x = 251,945,376.98/21,104.86
  6. Step 6: Final answer
    x = 11,937.79

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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.