Home / 20,816.74-31,221.92-7,665.96

Finding the Fourth Proportional to 20,816.74, 31,221.92 and 7,665.96

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Solution

The fourth proportional to 20,816.74, 31,221.92 and 7,665.96 is: 11,497.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.74 : 31,221.92 = 7,665.96 : x
  2. Step 2: Convert to fraction form
    20,816.74/31,221.92 = 7,665.96/x
  3. Step 3: Cross multiply
    20,816.74x = 31,221.92 × 7,665.96
  4. Step 4: Simplify right side
    20,816.74x = 239,345,989.84
  5. Step 5: Solve for x
    x = 239,345,989.84/20,816.74
  6. Step 6: Final answer
    x = 11,497.77

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1.5x scale

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.