Home / 21,906.36-30,230.64-12,958.29

Finding the Fourth Proportional to 21,906.36, 30,230.64 and 12,958.29

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Solution

The fourth proportional to 21,906.36, 30,230.64 and 12,958.29 is: 17,882.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,906.36 : 30,230.64 = 12,958.29 : x
  2. Step 2: Convert to fraction form
    21,906.36/30,230.64 = 12,958.29/x
  3. Step 3: Cross multiply
    21,906.36x = 30,230.64 × 12,958.29
  4. Step 4: Simplify right side
    21,906.36x = 391,737,400.01
  5. Step 5: Solve for x
    x = 391,737,400.01/21,906.36
  6. Step 6: Final answer
    x = 17,882.36

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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.