Home / 20,811.72-31,214.44-7,660.97

Finding the Fourth Proportional to 20,811.72, 31,214.44 and 7,660.97

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Solution

The fourth proportional to 20,811.72, 31,214.44 and 7,660.97 is: 11,490.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.72 : 31,214.44 = 7,660.97 : x
  2. Step 2: Convert to fraction form
    20,811.72/31,214.44 = 7,660.97/x
  3. Step 3: Cross multiply
    20,811.72x = 31,214.44 × 7,660.97
  4. Step 4: Simplify right side
    20,811.72x = 239,132,888.41
  5. Step 5: Solve for x
    x = 239,132,888.41/20,811.72
  6. Step 6: Final answer
    x = 11,490.30

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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.