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Finding the Fourth Proportional to 6,280.64, 8,665.08 and 3,921.92

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Solution

The fourth proportional to 6,280.64, 8,665.08 and 3,921.92 is: 5,410.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,280.64 : 8,665.08 = 3,921.92 : x
  2. Step 2: Convert to fraction form
    6,280.64/8,665.08 = 3,921.92/x
  3. Step 3: Cross multiply
    6,280.64x = 8,665.08 × 3,921.92
  4. Step 4: Simplify right side
    6,280.64x = 33,983,750.55
  5. Step 5: Solve for x
    x = 33,983,750.55/6,280.64
  6. Step 6: Final answer
    x = 5,410.87

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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.