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Finding the Fourth Proportional to 8,507.25, 11,739.90 and 4,872.81

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Solution

The fourth proportional to 8,507.25, 11,739.90 and 4,872.81 is: 6,724.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,507.25 : 11,739.90 = 4,872.81 : x
  2. Step 2: Convert to fraction form
    8,507.25/11,739.90 = 4,872.81/x
  3. Step 3: Cross multiply
    8,507.25x = 11,739.90 × 4,872.81
  4. Step 4: Simplify right side
    8,507.25x = 57,206,302.12
  5. Step 5: Solve for x
    x = 57,206,302.12/8,507.25
  6. Step 6: Final answer
    x = 6,724.42

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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.