Home / 20,991.48-31,487.60-6,200.68

Finding the Fourth Proportional to 20,991.48, 31,487.60 and 6,200.68

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Solution

The fourth proportional to 20,991.48, 31,487.60 and 6,200.68 is: 9,301.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.48 : 31,487.60 = 6,200.68 : x
  2. Step 2: Convert to fraction form
    20,991.48/31,487.60 = 6,200.68/x
  3. Step 3: Cross multiply
    20,991.48x = 31,487.60 × 6,200.68
  4. Step 4: Simplify right side
    20,991.48x = 195,244,531.57
  5. Step 5: Solve for x
    x = 195,244,531.57/20,991.48
  6. Step 6: Final answer
    x = 9,301.13

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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.