Home / 13,808.05-20,712.75-3,948.78

Finding the Fourth Proportional to 13,808.05, 20,712.75 and 3,948.78

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Solution

The fourth proportional to 13,808.05, 20,712.75 and 3,948.78 is: 5,923.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,808.05 : 20,712.75 = 3,948.78 : x
  2. Step 2: Convert to fraction form
    13,808.05/20,712.75 = 3,948.78/x
  3. Step 3: Cross multiply
    13,808.05x = 20,712.75 × 3,948.78
  4. Step 4: Simplify right side
    13,808.05x = 81,790,092.95
  5. Step 5: Solve for x
    x = 81,790,092.95/13,808.05
  6. Step 6: Final answer
    x = 5,923.36

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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.