Home / 20,971.84-31,451.09-6,929.24

Finding the Fourth Proportional to 20,971.84, 31,451.09 and 6,929.24

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Solution

The fourth proportional to 20,971.84, 31,451.09 and 6,929.24 is: 10,391.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.84 : 31,451.09 = 6,929.24 : x
  2. Step 2: Convert to fraction form
    20,971.84/31,451.09 = 6,929.24/x
  3. Step 3: Cross multiply
    20,971.84x = 31,451.09 × 6,929.24
  4. Step 4: Simplify right side
    20,971.84x = 217,932,194.85
  5. Step 5: Solve for x
    x = 217,932,194.85/20,971.84
  6. Step 6: Final answer
    x = 10,391.66

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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.