Home / 5,917.20-8,165.40-3,679.20

Finding the Fourth Proportional to 5,917.20, 8,165.40 and 3,679.20

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Solution

The fourth proportional to 5,917.20, 8,165.40 and 3,679.20 is: 5,077.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,917.20 : 8,165.40 = 3,679.20 : x
  2. Step 2: Convert to fraction form
    5,917.20/8,165.40 = 3,679.20/x
  3. Step 3: Cross multiply
    5,917.20x = 8,165.40 × 3,679.20
  4. Step 4: Simplify right side
    5,917.20x = 30,042,139.68
  5. Step 5: Solve for x
    x = 30,042,139.68/5,917.20
  6. Step 6: Final answer
    x = 5,077.09

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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.