Home / 3,491.60-5,237.40-2,109.20

Finding the Fourth Proportional to 3,491.60, 5,237.40 and 2,109.20

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Solution

The fourth proportional to 3,491.60, 5,237.40 and 2,109.20 is: 3,163.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,491.60 : 5,237.40 = 2,109.20 : x
  2. Step 2: Convert to fraction form
    3,491.60/5,237.40 = 2,109.20/x
  3. Step 3: Cross multiply
    3,491.60x = 5,237.40 × 2,109.20
  4. Step 4: Simplify right side
    3,491.60x = 11,046,724.08
  5. Step 5: Solve for x
    x = 11,046,724.08/3,491.60
  6. Step 6: Final answer
    x = 3,163.80

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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.