Home / 20,795.76-31,228.20-20,634.48

Finding the Fourth Proportional to 20,795.76, 31,228.20 and 20,634.48

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Solution

The fourth proportional to 20,795.76, 31,228.20 and 20,634.48 is: 30,986.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,795.76 : 31,228.20 = 20,634.48 : x
  2. Step 2: Convert to fraction form
    20,795.76/31,228.20 = 20,634.48/x
  3. Step 3: Cross multiply
    20,795.76x = 31,228.20 × 20,634.48
  4. Step 4: Simplify right side
    20,795.76x = 644,377,668.34
  5. Step 5: Solve for x
    x = 644,377,668.34/20,795.76
  6. Step 6: Final answer
    x = 30,986.01

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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.