Home / 3,991.70-5,508.60-2,313.20

Finding the Fourth Proportional to 3,991.70, 5,508.60 and 2,313.20

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Solution

The fourth proportional to 3,991.70, 5,508.60 and 2,313.20 is: 3,192.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.70 : 5,508.60 = 2,313.20 : x
  2. Step 2: Convert to fraction form
    3,991.70/5,508.60 = 2,313.20/x
  3. Step 3: Cross multiply
    3,991.70x = 5,508.60 × 2,313.20
  4. Step 4: Simplify right side
    3,991.70x = 12,742,493.52
  5. Step 5: Solve for x
    x = 12,742,493.52/3,991.70
  6. Step 6: Final answer
    x = 3,192.25

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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.