Home / 21,279.75-29,366.10-11,850.18

Finding the Fourth Proportional to 21,279.75, 29,366.10 and 11,850.18

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Solution

The fourth proportional to 21,279.75, 29,366.10 and 11,850.18 is: 16,353.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.75 : 29,366.10 = 11,850.18 : x
  2. Step 2: Convert to fraction form
    21,279.75/29,366.10 = 11,850.18/x
  3. Step 3: Cross multiply
    21,279.75x = 29,366.10 × 11,850.18
  4. Step 4: Simplify right side
    21,279.75x = 347,993,570.90
  5. Step 5: Solve for x
    x = 347,993,570.90/21,279.75
  6. Step 6: Final answer
    x = 16,353.27

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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.