Home / 20,899.22-31,348.82-7,748.06

Finding the Fourth Proportional to 20,899.22, 31,348.82 and 7,748.06

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Solution

The fourth proportional to 20,899.22, 31,348.82 and 7,748.06 is: 11,622.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.22 : 31,348.82 = 7,748.06 : x
  2. Step 2: Convert to fraction form
    20,899.22/31,348.82 = 7,748.06/x
  3. Step 3: Cross multiply
    20,899.22x = 31,348.82 × 7,748.06
  4. Step 4: Simplify right side
    20,899.22x = 242,892,400.92
  5. Step 5: Solve for x
    x = 242,892,400.92/20,899.22
  6. Step 6: Final answer
    x = 11,622.08

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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.