Home / 21,189.60-29,244.24-11,761.20

Finding the Fourth Proportional to 21,189.60, 29,244.24 and 11,761.20

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Solution

The fourth proportional to 21,189.60, 29,244.24 and 11,761.20 is: 16,231.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.60 : 29,244.24 = 11,761.20 : x
  2. Step 2: Convert to fraction form
    21,189.60/29,244.24 = 11,761.20/x
  3. Step 3: Cross multiply
    21,189.60x = 29,244.24 × 11,761.20
  4. Step 4: Simplify right side
    21,189.60x = 343,947,355.49
  5. Step 5: Solve for x
    x = 343,947,355.49/21,189.60
  6. Step 6: Final answer
    x = 16,231.89

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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.