Home / 7,779.11-11,665.23-2,231.20

Finding the Fourth Proportional to 7,779.11, 11,665.23 and 2,231.20

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Solution

The fourth proportional to 7,779.11, 11,665.23 and 2,231.20 is: 3,345.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,779.11 : 11,665.23 = 2,231.20 : x
  2. Step 2: Convert to fraction form
    7,779.11/11,665.23 = 2,231.20/x
  3. Step 3: Cross multiply
    7,779.11x = 11,665.23 × 2,231.20
  4. Step 4: Simplify right side
    7,779.11x = 26,027,402.85
  5. Step 5: Solve for x
    x = 26,027,402.85/7,779.11
  6. Step 6: Final answer
    x = 3,345.81

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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.