Home / 5,149.60-7,104.78-2,911.28

Finding the Fourth Proportional to 5,149.60, 7,104.78 and 2,911.28

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Solution

The fourth proportional to 5,149.60, 7,104.78 and 2,911.28 is: 4,016.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,149.60 : 7,104.78 = 2,911.28 : x
  2. Step 2: Convert to fraction form
    5,149.60/7,104.78 = 2,911.28/x
  3. Step 3: Cross multiply
    5,149.60x = 7,104.78 × 2,911.28
  4. Step 4: Simplify right side
    5,149.60x = 20,683,968.39
  5. Step 5: Solve for x
    x = 20,683,968.39/5,149.60
  6. Step 6: Final answer
    x = 4,016.62

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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.