Home / 7,135.70-9,847.58-3,991.95

Finding the Fourth Proportional to 7,135.70, 9,847.58 and 3,991.95

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Solution

The fourth proportional to 7,135.70, 9,847.58 and 3,991.95 is: 5,509.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,135.70 : 9,847.58 = 3,991.95 : x
  2. Step 2: Convert to fraction form
    7,135.70/9,847.58 = 3,991.95/x
  3. Step 3: Cross multiply
    7,135.70x = 9,847.58 × 3,991.95
  4. Step 4: Simplify right side
    7,135.70x = 39,311,027.02
  5. Step 5: Solve for x
    x = 39,311,027.02/7,135.70
  6. Step 6: Final answer
    x = 5,509.07

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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.