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Finding the Fourth Proportional to 9,268.68, 12,787.77 and 5,679.90

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Solution

The fourth proportional to 9,268.68, 12,787.77 and 5,679.90 is: 7,836.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,268.68 : 12,787.77 = 5,679.90 : x
  2. Step 2: Convert to fraction form
    9,268.68/12,787.77 = 5,679.90/x
  3. Step 3: Cross multiply
    9,268.68x = 12,787.77 × 5,679.90
  4. Step 4: Simplify right side
    9,268.68x = 72,633,254.82
  5. Step 5: Solve for x
    x = 72,633,254.82/9,268.68
  6. Step 6: Final answer
    x = 7,836.42

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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.