Home / 21,749.92-30,016.97-12,189.76

Finding the Fourth Proportional to 21,749.92, 30,016.97 and 12,189.76

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Solution

The fourth proportional to 21,749.92, 30,016.97 and 12,189.76 is: 16,823.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,749.92 : 30,016.97 = 12,189.76 : x
  2. Step 2: Convert to fraction form
    21,749.92/30,016.97 = 12,189.76/x
  3. Step 3: Cross multiply
    21,749.92x = 30,016.97 × 12,189.76
  4. Step 4: Simplify right side
    21,749.92x = 365,899,449.19
  5. Step 5: Solve for x
    x = 365,899,449.19/21,749.92
  6. Step 6: Final answer
    x = 16,823.03

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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.