Home / 7,878.90-11,825.58-3,986.04

Finding the Fourth Proportional to 7,878.90, 11,825.58 and 3,986.04

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Solution

The fourth proportional to 7,878.90, 11,825.58 and 3,986.04 is: 5,982.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.90 : 11,825.58 = 3,986.04 : x
  2. Step 2: Convert to fraction form
    7,878.90/11,825.58 = 3,986.04/x
  3. Step 3: Cross multiply
    7,878.90x = 11,825.58 × 3,986.04
  4. Step 4: Simplify right side
    7,878.90x = 47,137,234.90
  5. Step 5: Solve for x
    x = 47,137,234.90/7,878.90
  6. Step 6: Final answer
    x = 5,982.72

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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.