Home / 21,910.71-30,242.97-12,961.32

Finding the Fourth Proportional to 21,910.71, 30,242.97 and 12,961.32

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Solution

The fourth proportional to 21,910.71, 30,242.97 and 12,961.32 is: 17,890.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,910.71 : 30,242.97 = 12,961.32 : x
  2. Step 2: Convert to fraction form
    21,910.71/30,242.97 = 12,961.32/x
  3. Step 3: Cross multiply
    21,910.71x = 30,242.97 × 12,961.32
  4. Step 4: Simplify right side
    21,910.71x = 391,988,787.62
  5. Step 5: Solve for x
    x = 391,988,787.62/21,910.71
  6. Step 6: Final answer
    x = 17,890.29

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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.