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Finding the Fourth Proportional to 6,722.31, 9,276.79 and 3,927.81

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Solution

The fourth proportional to 6,722.31, 9,276.79 and 3,927.81 is: 5,420.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,722.31 : 9,276.79 = 3,927.81 : x
  2. Step 2: Convert to fraction form
    6,722.31/9,276.79 = 3,927.81/x
  3. Step 3: Cross multiply
    6,722.31x = 9,276.79 × 3,927.81
  4. Step 4: Simplify right side
    6,722.31x = 36,437,468.53
  5. Step 5: Solve for x
    x = 36,437,468.53/6,722.31
  6. Step 6: Final answer
    x = 5,420.38

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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.