Home / 21,620.45-29,832.79-12,187.19

Finding the Fourth Proportional to 21,620.45, 29,832.79 and 12,187.19

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Solution

The fourth proportional to 21,620.45, 29,832.79 and 12,187.19 is: 16,816.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,620.45 : 29,832.79 = 12,187.19 : x
  2. Step 2: Convert to fraction form
    21,620.45/29,832.79 = 12,187.19/x
  3. Step 3: Cross multiply
    21,620.45x = 29,832.79 × 12,187.19
  4. Step 4: Simplify right side
    21,620.45x = 363,577,879.96
  5. Step 5: Solve for x
    x = 363,577,879.96/21,620.45
  6. Step 6: Final answer
    x = 16,816.39

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Half scale
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Double scale
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Similar ratio
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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.