Home / 5,147.70-7,103.88-2,909.60

Finding the Fourth Proportional to 5,147.70, 7,103.88 and 2,909.60

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Solution

The fourth proportional to 5,147.70, 7,103.88 and 2,909.60 is: 4,015.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,147.70 : 7,103.88 = 2,909.60 : x
  2. Step 2: Convert to fraction form
    5,147.70/7,103.88 = 2,909.60/x
  3. Step 3: Cross multiply
    5,147.70x = 7,103.88 × 2,909.60
  4. Step 4: Simplify right side
    5,147.70x = 20,669,449.25
  5. Step 5: Solve for x
    x = 20,669,449.25/5,147.70
  6. Step 6: Final answer
    x = 4,015.28

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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.