Home / 13,981.25-20,936.81-8,355.45

Finding the Fourth Proportional to 13,981.25, 20,936.81 and 8,355.45

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Solution

The fourth proportional to 13,981.25, 20,936.81 and 8,355.45 is: 12,512.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,981.25 : 20,936.81 = 8,355.45 : x
  2. Step 2: Convert to fraction form
    13,981.25/20,936.81 = 8,355.45/x
  3. Step 3: Cross multiply
    13,981.25x = 20,936.81 × 8,355.45
  4. Step 4: Simplify right side
    13,981.25x = 174,936,427.34
  5. Step 5: Solve for x
    x = 174,936,427.34/13,981.25
  6. Step 6: Final answer
    x = 12,512.22

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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.