Home / 21,749.91-30,016.97-12,189.75

Finding the Fourth Proportional to 21,749.91, 30,016.97 and 12,189.75

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Solution

The fourth proportional to 21,749.91, 30,016.97 and 12,189.75 is: 16,823.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,749.91 : 30,016.97 = 12,189.75 : x
  2. Step 2: Convert to fraction form
    21,749.91/30,016.97 = 12,189.75/x
  3. Step 3: Cross multiply
    21,749.91x = 30,016.97 × 12,189.75
  4. Step 4: Simplify right side
    21,749.91x = 365,899,360.06
  5. Step 5: Solve for x
    x = 365,899,360.06/21,749.91
  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.