Home / 21,105.51-29,122.16-11,672.25

Finding the Fourth Proportional to 21,105.51, 29,122.16 and 11,672.25

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Solution

The fourth proportional to 21,105.51, 29,122.16 and 11,672.25 is: 16,105.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,105.51 : 29,122.16 = 11,672.25 : x
  2. Step 2: Convert to fraction form
    21,105.51/29,122.16 = 11,672.25/x
  3. Step 3: Cross multiply
    21,105.51x = 29,122.16 × 11,672.25
  4. Step 4: Simplify right side
    21,105.51x = 339,921,073.70
  5. Step 5: Solve for x
    x = 339,921,073.70/21,105.51
  6. Step 6: Final answer
    x = 16,105.80

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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.