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Finding the Fourth Proportional to 6,381.36, 8,806.62 and 3,728.40

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Solution

The fourth proportional to 6,381.36, 8,806.62 and 3,728.40 is: 5,145.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,381.36 : 8,806.62 = 3,728.40 : x
  2. Step 2: Convert to fraction form
    6,381.36/8,806.62 = 3,728.40/x
  3. Step 3: Cross multiply
    6,381.36x = 8,806.62 × 3,728.40
  4. Step 4: Simplify right side
    6,381.36x = 32,834,602.01
  5. Step 5: Solve for x
    x = 32,834,602.01/6,381.36
  6. Step 6: Final answer
    x = 5,145.39

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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.