Home / 20,788.20-31,182.30-5,205.84

Finding the Fourth Proportional to 20,788.20, 31,182.30 and 5,205.84

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Solution

The fourth proportional to 20,788.20, 31,182.30 and 5,205.84 is: 7,808.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.20 : 31,182.30 = 5,205.84 : x
  2. Step 2: Convert to fraction form
    20,788.20/31,182.30 = 5,205.84/x
  3. Step 3: Cross multiply
    20,788.20x = 31,182.30 × 5,205.84
  4. Step 4: Simplify right side
    20,788.20x = 162,330,064.63
  5. Step 5: Solve for x
    x = 162,330,064.63/20,788.20
  6. Step 6: Final answer
    x = 7,808.76

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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.