Home / 21,105.62-29,125.42-11,674.18

Finding the Fourth Proportional to 21,105.62, 29,125.42 and 11,674.18

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Solution

The fourth proportional to 21,105.62, 29,125.42 and 11,674.18 is: 16,110.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,105.62 : 29,125.42 = 11,674.18 : x
  2. Step 2: Convert to fraction form
    21,105.62/29,125.42 = 11,674.18/x
  3. Step 3: Cross multiply
    21,105.62x = 29,125.42 × 11,674.18
  4. Step 4: Simplify right side
    21,105.62x = 340,015,395.66
  5. Step 5: Solve for x
    x = 340,015,395.66/21,105.62
  6. Step 6: Final answer
    x = 16,110.18

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Half scale
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Double scale
Find fourth proportional to 21,106.62, 29,126.80 and 11,675.18
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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.