Home / 21,749.28-30,016.11-12,190.79

Finding the Fourth Proportional to 21,749.28, 30,016.11 and 12,190.79

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Solution

The fourth proportional to 21,749.28, 30,016.11 and 12,190.79 is: 16,824.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,749.28 : 30,016.11 = 12,190.79 : x
  2. Step 2: Convert to fraction form
    21,749.28/30,016.11 = 12,190.79/x
  3. Step 3: Cross multiply
    21,749.28x = 30,016.11 × 12,190.79
  4. Step 4: Simplify right side
    21,749.28x = 365,919,897.83
  5. Step 5: Solve for x
    x = 365,919,897.83/21,749.28
  6. Step 6: Final answer
    x = 16,824.46

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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.