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Finding the Fourth Proportional to 6,388.17, 8,815.74 and 3,517.22

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Solution

The fourth proportional to 6,388.17, 8,815.74 and 3,517.22 is: 4,853.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,388.17 : 8,815.74 = 3,517.22 : x
  2. Step 2: Convert to fraction form
    6,388.17/8,815.74 = 3,517.22/x
  3. Step 3: Cross multiply
    6,388.17x = 8,815.74 × 3,517.22
  4. Step 4: Simplify right side
    6,388.17x = 31,006,852.96
  5. Step 5: Solve for x
    x = 31,006,852.96/6,388.17
  6. Step 6: Final answer
    x = 4,853.80

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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.