Home / 13,981.75-20,982.34-9,039.13

Finding the Fourth Proportional to 13,981.75, 20,982.34 and 9,039.13

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Solution

The fourth proportional to 13,981.75, 20,982.34 and 9,039.13 is: 13,564.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,981.75 : 20,982.34 = 9,039.13 : x
  2. Step 2: Convert to fraction form
    13,981.75/20,982.34 = 9,039.13/x
  3. Step 3: Cross multiply
    13,981.75x = 20,982.34 × 9,039.13
  4. Step 4: Simplify right side
    13,981.75x = 189,662,098.96
  5. Step 5: Solve for x
    x = 189,662,098.96/13,981.75
  6. Step 6: Final answer
    x = 13,564.98

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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.