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Finding the Fourth Proportional to 6,405.16, 8,837.61 and 3,887.21

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Solution

The fourth proportional to 6,405.16, 8,837.61 and 3,887.21 is: 5,363.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,405.16 : 8,837.61 = 3,887.21 : x
  2. Step 2: Convert to fraction form
    6,405.16/8,837.61 = 3,887.21/x
  3. Step 3: Cross multiply
    6,405.16x = 8,837.61 × 3,887.21
  4. Step 4: Simplify right side
    6,405.16x = 34,353,645.97
  5. Step 5: Solve for x
    x = 34,353,645.97/6,405.16
  6. Step 6: Final answer
    x = 5,363.43

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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.