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Finding the Fourth Proportional to 6,381.76, 8,806.72 and 3,587.20

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Solution

The fourth proportional to 6,381.76, 8,806.72 and 3,587.20 is: 4,950.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,381.76 : 8,806.72 = 3,587.20 : x
  2. Step 2: Convert to fraction form
    6,381.76/8,806.72 = 3,587.20/x
  3. Step 3: Cross multiply
    6,381.76x = 8,806.72 × 3,587.20
  4. Step 4: Simplify right side
    6,381.76x = 31,591,465.98
  5. Step 5: Solve for x
    x = 31,591,465.98/6,381.76
  6. Step 6: Final answer
    x = 4,950.27

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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.