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Finding the Fourth Proportional to 6,291.72, 8,682.62 and 3,935.20

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Solution

The fourth proportional to 6,291.72, 8,682.62 and 3,935.20 is: 5,430.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,291.72 : 8,682.62 = 3,935.20 : x
  2. Step 2: Convert to fraction form
    6,291.72/8,682.62 = 3,935.20/x
  3. Step 3: Cross multiply
    6,291.72x = 8,682.62 × 3,935.20
  4. Step 4: Simplify right side
    6,291.72x = 34,167,846.22
  5. Step 5: Solve for x
    x = 34,167,846.22/6,291.72
  6. Step 6: Final answer
    x = 5,430.61

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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.