Home / 21,723.75-29,978.79-11,787.75

Finding the Fourth Proportional to 21,723.75, 29,978.79 and 11,787.75

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Solution

The fourth proportional to 21,723.75, 29,978.79 and 11,787.75 is: 16,267.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,723.75 : 29,978.79 = 11,787.75 : x
  2. Step 2: Convert to fraction form
    21,723.75/29,978.79 = 11,787.75/x
  3. Step 3: Cross multiply
    21,723.75x = 29,978.79 × 11,787.75
  4. Step 4: Simplify right side
    21,723.75x = 353,382,481.82
  5. Step 5: Solve for x
    x = 353,382,481.82/21,723.75
  6. Step 6: Final answer
    x = 16,267.10

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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.