Home / 7,144.30-9,858.40-4,119.76

Finding the Fourth Proportional to 7,144.30, 9,858.40 and 4,119.76

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Solution

The fourth proportional to 7,144.30, 9,858.40 and 4,119.76 is: 5,684.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,144.30 : 9,858.40 = 4,119.76 : x
  2. Step 2: Convert to fraction form
    7,144.30/9,858.40 = 4,119.76/x
  3. Step 3: Cross multiply
    7,144.30x = 9,858.40 × 4,119.76
  4. Step 4: Simplify right side
    7,144.30x = 40,614,241.98
  5. Step 5: Solve for x
    x = 40,614,241.98/7,144.30
  6. Step 6: Final answer
    x = 5,684.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.