Home / 20,779.12-31,149.83-8,296.52

Finding the Fourth Proportional to 20,779.12, 31,149.83 and 8,296.52

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Solution

The fourth proportional to 20,779.12, 31,149.83 and 8,296.52 is: 12,437.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.12 : 31,149.83 = 8,296.52 : x
  2. Step 2: Convert to fraction form
    20,779.12/31,149.83 = 8,296.52/x
  3. Step 3: Cross multiply
    20,779.12x = 31,149.83 × 8,296.52
  4. Step 4: Simplify right side
    20,779.12x = 258,435,187.59
  5. Step 5: Solve for x
    x = 258,435,187.59/20,779.12
  6. Step 6: Final answer
    x = 12,437.25

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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.