Home / 12,971.88-19,459.20-3,611.92

Finding the Fourth Proportional to 12,971.88, 19,459.20 and 3,611.92

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Solution

The fourth proportional to 12,971.88, 19,459.20 and 3,611.92 is: 5,418.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,971.88 : 19,459.20 = 3,611.92 : x
  2. Step 2: Convert to fraction form
    12,971.88/19,459.20 = 3,611.92/x
  3. Step 3: Cross multiply
    12,971.88x = 19,459.20 × 3,611.92
  4. Step 4: Simplify right side
    12,971.88x = 70,285,073.66
  5. Step 5: Solve for x
    x = 70,285,073.66/12,971.88
  6. Step 6: Final answer
    x = 5,418.26

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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.