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Finding the Fourth Proportional to 6,876.64, 9,490.32 and 3,893.20

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Solution

The fourth proportional to 6,876.64, 9,490.32 and 3,893.20 is: 5,372.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,876.64 : 9,490.32 = 3,893.20 : x
  2. Step 2: Convert to fraction form
    6,876.64/9,490.32 = 3,893.20/x
  3. Step 3: Cross multiply
    6,876.64x = 9,490.32 × 3,893.20
  4. Step 4: Simplify right side
    6,876.64x = 36,947,713.82
  5. Step 5: Solve for x
    x = 36,947,713.82/6,876.64
  6. Step 6: Final answer
    x = 5,372.93

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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.