Home / 20,688.60-31,029.83-7,537.90

Finding the Fourth Proportional to 20,688.60, 31,029.83 and 7,537.90

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Solution

The fourth proportional to 20,688.60, 31,029.83 and 7,537.90 is: 11,305.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.60 : 31,029.83 = 7,537.90 : x
  2. Step 2: Convert to fraction form
    20,688.60/31,029.83 = 7,537.90/x
  3. Step 3: Cross multiply
    20,688.60x = 31,029.83 × 7,537.90
  4. Step 4: Simplify right side
    20,688.60x = 233,899,755.56
  5. Step 5: Solve for x
    x = 233,899,755.56/20,688.60
  6. Step 6: Final answer
    x = 11,305.73

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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.