Home / 21,819.75-30,111.26-11,883.75

Finding the Fourth Proportional to 21,819.75, 30,111.26 and 11,883.75

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Solution

The fourth proportional to 21,819.75, 30,111.26 and 11,883.75 is: 16,399.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,819.75 : 30,111.26 = 11,883.75 : x
  2. Step 2: Convert to fraction form
    21,819.75/30,111.26 = 11,883.75/x
  3. Step 3: Cross multiply
    21,819.75x = 30,111.26 × 11,883.75
  4. Step 4: Simplify right side
    21,819.75x = 357,834,626.61
  5. Step 5: Solve for x
    x = 357,834,626.61/21,819.75
  6. Step 6: Final answer
    x = 16,399.58

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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.