Home / 20,747.14-31,120.63-8,899.90

Finding the Fourth Proportional to 20,747.14, 31,120.63 and 8,899.90

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Solution

The fourth proportional to 20,747.14, 31,120.63 and 8,899.90 is: 13,349.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.14 : 31,120.63 = 8,899.90 : x
  2. Step 2: Convert to fraction form
    20,747.14/31,120.63 = 8,899.90/x
  3. Step 3: Cross multiply
    20,747.14x = 31,120.63 × 8,899.90
  4. Step 4: Simplify right side
    20,747.14x = 276,970,372.64
  5. Step 5: Solve for x
    x = 276,970,372.64/20,747.14
  6. Step 6: Final answer
    x = 13,349.81

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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.