Home / 19,561.50-29,351.16-7,872.39

Finding the Fourth Proportional to 19,561.50, 29,351.16 and 7,872.39

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Solution

The fourth proportional to 19,561.50, 29,351.16 and 7,872.39 is: 11,812.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,561.50 : 29,351.16 = 7,872.39 : x
  2. Step 2: Convert to fraction form
    19,561.50/29,351.16 = 7,872.39/x
  3. Step 3: Cross multiply
    19,561.50x = 29,351.16 × 7,872.39
  4. Step 4: Simplify right side
    19,561.50x = 231,063,778.47
  5. Step 5: Solve for x
    x = 231,063,778.47/19,561.50
  6. Step 6: Final answer
    x = 11,812.17

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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.