Home / 18,221.89-25,157.13-11,945.20

Finding the Fourth Proportional to 18,221.89, 25,157.13 and 11,945.20

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Solution

The fourth proportional to 18,221.89, 25,157.13 and 11,945.20 is: 16,491.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,221.89 : 25,157.13 = 11,945.20 : x
  2. Step 2: Convert to fraction form
    18,221.89/25,157.13 = 11,945.20/x
  3. Step 3: Cross multiply
    18,221.89x = 25,157.13 × 11,945.20
  4. Step 4: Simplify right side
    18,221.89x = 300,506,949.28
  5. Step 5: Solve for x
    x = 300,506,949.28/18,221.89
  6. Step 6: Final answer
    x = 16,491.54

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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.