Home / 21,110.35-29,131.38-11,678.29

Finding the Fourth Proportional to 21,110.35, 29,131.38 and 11,678.29

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Solution

The fourth proportional to 21,110.35, 29,131.38 and 11,678.29 is: 16,115.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.35 : 29,131.38 = 11,678.29 : x
  2. Step 2: Convert to fraction form
    21,110.35/29,131.38 = 11,678.29/x
  3. Step 3: Cross multiply
    21,110.35x = 29,131.38 × 11,678.29
  4. Step 4: Simplify right side
    21,110.35x = 340,204,703.74
  5. Step 5: Solve for x
    x = 340,204,703.74/21,110.35
  6. Step 6: Final answer
    x = 16,115.54

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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.