Home / 21,219.80-29,282.18-11,787.75

Finding the Fourth Proportional to 21,219.80, 29,282.18 and 11,787.75

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Solution

The fourth proportional to 21,219.80, 29,282.18 and 11,787.75 is: 16,266.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.80 : 29,282.18 = 11,787.75 : x
  2. Step 2: Convert to fraction form
    21,219.80/29,282.18 = 11,787.75/x
  3. Step 3: Cross multiply
    21,219.80x = 29,282.18 × 11,787.75
  4. Step 4: Simplify right side
    21,219.80x = 345,170,958.36
  5. Step 5: Solve for x
    x = 345,170,958.36/21,219.80
  6. Step 6: Final answer
    x = 16,266.46

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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.