Home / 20,809.75-31,217.73-7,661.11

Finding the Fourth Proportional to 20,809.75, 31,217.73 and 7,661.11

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Solution

The fourth proportional to 20,809.75, 31,217.73 and 7,661.11 is: 11,492.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.75 : 31,217.73 = 7,661.11 : x
  2. Step 2: Convert to fraction form
    20,809.75/31,217.73 = 7,661.11/x
  3. Step 3: Cross multiply
    20,809.75x = 31,217.73 × 7,661.11
  4. Step 4: Simplify right side
    20,809.75x = 239,162,463.48
  5. Step 5: Solve for x
    x = 239,162,463.48/20,809.75
  6. Step 6: Final answer
    x = 11,492.81

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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.