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Finding the Fourth Proportional to 6,361.30, 8,782.92 and 3,972.20

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Solution

The fourth proportional to 6,361.30, 8,782.92 and 3,972.20 is: 5,484.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,361.30 : 8,782.92 = 3,972.20 : x
  2. Step 2: Convert to fraction form
    6,361.30/8,782.92 = 3,972.20/x
  3. Step 3: Cross multiply
    6,361.30x = 8,782.92 × 3,972.20
  4. Step 4: Simplify right side
    6,361.30x = 34,887,536.78
  5. Step 5: Solve for x
    x = 34,887,536.78/6,361.30
  6. Step 6: Final answer
    x = 5,484.34

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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.