Home / 20,805.24-31,220.19-7,666.83

Finding the Fourth Proportional to 20,805.24, 31,220.19 and 7,666.83

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Solution

The fourth proportional to 20,805.24, 31,220.19 and 7,666.83 is: 11,504.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.24 : 31,220.19 = 7,666.83 : x
  2. Step 2: Convert to fraction form
    20,805.24/31,220.19 = 7,666.83/x
  3. Step 3: Cross multiply
    20,805.24x = 31,220.19 × 7,666.83
  4. Step 4: Simplify right side
    20,805.24x = 239,359,889.30
  5. Step 5: Solve for x
    x = 239,359,889.30/20,805.24
  6. Step 6: Final answer
    x = 11,504.79

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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.