Home / 20,788.11-31,182.08-5,205.69

Finding the Fourth Proportional to 20,788.11, 31,182.08 and 5,205.69

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Solution

The fourth proportional to 20,788.11, 31,182.08 and 5,205.69 is: 7,808.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.11 : 31,182.08 = 5,205.69 : x
  2. Step 2: Convert to fraction form
    20,788.11/31,182.08 = 5,205.69/x
  3. Step 3: Cross multiply
    20,788.11x = 31,182.08 × 5,205.69
  4. Step 4: Simplify right side
    20,788.11x = 162,324,216.01
  5. Step 5: Solve for x
    x = 162,324,216.01/20,788.11
  6. Step 6: Final answer
    x = 7,808.51

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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.