Home / 12,625.18-18,917-7,679.92

Finding the Fourth Proportional to 12,625.18, 18,917 and 7,679.92

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Solution

The fourth proportional to 12,625.18, 18,917 and 7,679.92 is: 11,507.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,625.18 : 18,917 = 7,679.92 : x
  2. Step 2: Convert to fraction form
    12,625.18/18,917 = 7,679.92/x
  3. Step 3: Cross multiply
    12,625.18x = 18,917 × 7,679.92
  4. Step 4: Simplify right side
    12,625.18x = 145,281,046.64
  5. Step 5: Solve for x
    x = 145,281,046.64/12,625.18
  6. Step 6: Final answer
    x = 11,507.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.