Home / 21,961.55-30,306.94-11,889.99

Finding the Fourth Proportional to 21,961.55, 30,306.94 and 11,889.99

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Solution

The fourth proportional to 21,961.55, 30,306.94 and 11,889.99 is: 16,408.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,961.55 : 30,306.94 = 11,889.99 : x
  2. Step 2: Convert to fraction form
    21,961.55/30,306.94 = 11,889.99/x
  3. Step 3: Cross multiply
    21,961.55x = 30,306.94 × 11,889.99
  4. Step 4: Simplify right side
    21,961.55x = 360,349,183.81
  5. Step 5: Solve for x
    x = 360,349,183.81/21,961.55
  6. Step 6: Final answer
    x = 16,408.18

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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.