Home / 20,845.72-31,249.14-6,985

Finding the Fourth Proportional to 20,845.72, 31,249.14 and 6,985

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Solution

The fourth proportional to 20,845.72, 31,249.14 and 6,985 is: 10,470.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,845.72 : 31,249.14 = 6,985 : x
  2. Step 2: Convert to fraction form
    20,845.72/31,249.14 = 6,985/x
  3. Step 3: Cross multiply
    20,845.72x = 31,249.14 × 6,985
  4. Step 4: Simplify right side
    20,845.72x = 218,275,242.90
  5. Step 5: Solve for x
    x = 218,275,242.90/20,845.72
  6. Step 6: Final answer
    x = 10,470.99

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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.