Home / 6,991.20-9,648.08-4,007.60

Finding the Fourth Proportional to 6,991.20, 9,648.08 and 4,007.60

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Solution

The fourth proportional to 6,991.20, 9,648.08 and 4,007.60 is: 5,530.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,991.20 : 9,648.08 = 4,007.60 : x
  2. Step 2: Convert to fraction form
    6,991.20/9,648.08 = 4,007.60/x
  3. Step 3: Cross multiply
    6,991.20x = 9,648.08 × 4,007.60
  4. Step 4: Simplify right side
    6,991.20x = 38,665,621.29
  5. Step 5: Solve for x
    x = 38,665,621.29/6,991.20
  6. Step 6: Final answer
    x = 5,530.61

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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.