Home / 21,080.22-31,620.33-5,499.42

Finding the Fourth Proportional to 21,080.22, 31,620.33 and 5,499.42

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Solution

The fourth proportional to 21,080.22, 31,620.33 and 5,499.42 is: 8,249.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.22 : 31,620.33 = 5,499.42 : x
  2. Step 2: Convert to fraction form
    21,080.22/31,620.33 = 5,499.42/x
  3. Step 3: Cross multiply
    21,080.22x = 31,620.33 × 5,499.42
  4. Step 4: Simplify right side
    21,080.22x = 173,893,475.21
  5. Step 5: Solve for x
    x = 173,893,475.21/21,080.22
  6. Step 6: Final answer
    x = 8,249.13

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.