Home / 21,187.12-29,239.24-11,755.76

Finding the Fourth Proportional to 21,187.12, 29,239.24 and 11,755.76

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Solution

The fourth proportional to 21,187.12, 29,239.24 and 11,755.76 is: 16,223.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.12 : 29,239.24 = 11,755.76 : x
  2. Step 2: Convert to fraction form
    21,187.12/29,239.24 = 11,755.76/x
  3. Step 3: Cross multiply
    21,187.12x = 29,239.24 × 11,755.76
  4. Step 4: Simplify right side
    21,187.12x = 343,729,488.02
  5. Step 5: Solve for x
    x = 343,729,488.02/21,187.12
  6. Step 6: Final answer
    x = 16,223.51

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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.