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Finding the Fourth Proportional to 6,977.64, 9,629.20 and 3,993.52

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Solution

The fourth proportional to 6,977.64, 9,629.20 and 3,993.52 is: 5,511.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,977.64 : 9,629.20 = 3,993.52 : x
  2. Step 2: Convert to fraction form
    6,977.64/9,629.20 = 3,993.52/x
  3. Step 3: Cross multiply
    6,977.64x = 9,629.20 × 3,993.52
  4. Step 4: Simplify right side
    6,977.64x = 38,454,402.78
  5. Step 5: Solve for x
    x = 38,454,402.78/6,977.64
  6. Step 6: Final answer
    x = 5,511.09

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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.