Home / 20,976.75-31,457.62-6,934.18

Finding the Fourth Proportional to 20,976.75, 31,457.62 and 6,934.18

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Solution

The fourth proportional to 20,976.75, 31,457.62 and 6,934.18 is: 10,398.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.75 : 31,457.62 = 6,934.18 : x
  2. Step 2: Convert to fraction form
    20,976.75/31,457.62 = 6,934.18/x
  3. Step 3: Cross multiply
    20,976.75x = 31,457.62 × 6,934.18
  4. Step 4: Simplify right side
    20,976.75x = 218,132,816.79
  5. Step 5: Solve for x
    x = 218,132,816.79/20,976.75
  6. Step 6: Final answer
    x = 10,398.79

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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.