Home / 7,404.85-11,107.31-2,139.90

Finding the Fourth Proportional to 7,404.85, 11,107.31 and 2,139.90

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Solution

The fourth proportional to 7,404.85, 11,107.31 and 2,139.90 is: 3,209.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,404.85 : 11,107.31 = 2,139.90 : x
  2. Step 2: Convert to fraction form
    7,404.85/11,107.31 = 2,139.90/x
  3. Step 3: Cross multiply
    7,404.85x = 11,107.31 × 2,139.90
  4. Step 4: Simplify right side
    7,404.85x = 23,768,532.67
  5. Step 5: Solve for x
    x = 23,768,532.67/7,404.85
  6. Step 6: Final answer
    x = 3,209.86

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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.