Home / 21,099.20-29,115.66-11,667.56

Finding the Fourth Proportional to 21,099.20, 29,115.66 and 11,667.56

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Solution

The fourth proportional to 21,099.20, 29,115.66 and 11,667.56 is: 16,100.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,099.20 : 29,115.66 = 11,667.56 : x
  2. Step 2: Convert to fraction form
    21,099.20/29,115.66 = 11,667.56/x
  3. Step 3: Cross multiply
    21,099.20x = 29,115.66 × 11,667.56
  4. Step 4: Simplify right side
    21,099.20x = 339,708,709.99
  5. Step 5: Solve for x
    x = 339,708,709.99/21,099.20
  6. Step 6: Final answer
    x = 16,100.55

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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.