Home / 21,710.71-29,961.66-12,279.25

Finding the Fourth Proportional to 21,710.71, 29,961.66 and 12,279.25

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Solution

The fourth proportional to 21,710.71, 29,961.66 and 12,279.25 is: 16,945.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,710.71 : 29,961.66 = 12,279.25 : x
  2. Step 2: Convert to fraction form
    21,710.71/29,961.66 = 12,279.25/x
  3. Step 3: Cross multiply
    21,710.71x = 29,961.66 × 12,279.25
  4. Step 4: Simplify right side
    21,710.71x = 367,906,713.56
  5. Step 5: Solve for x
    x = 367,906,713.56/21,710.71
  6. Step 6: Final answer
    x = 16,945.86

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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.