Home / 20,517.12-30,779.52-8,206.08

Finding the Fourth Proportional to 20,517.12, 30,779.52 and 8,206.08

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Solution

The fourth proportional to 20,517.12, 30,779.52 and 8,206.08 is: 12,310.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.12 : 30,779.52 = 8,206.08 : x
  2. Step 2: Convert to fraction form
    20,517.12/30,779.52 = 8,206.08/x
  3. Step 3: Cross multiply
    20,517.12x = 30,779.52 × 8,206.08
  4. Step 4: Simplify right side
    20,517.12x = 252,579,203.48
  5. Step 5: Solve for x
    x = 252,579,203.48/20,517.12
  6. Step 6: Final answer
    x = 12,310.66

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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.