Home / 13,961.84-20,930.40-5,190.48

Finding the Fourth Proportional to 13,961.84, 20,930.40 and 5,190.48

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Solution

The fourth proportional to 13,961.84, 20,930.40 and 5,190.48 is: 7,781.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,961.84 : 20,930.40 = 5,190.48 : x
  2. Step 2: Convert to fraction form
    13,961.84/20,930.40 = 5,190.48/x
  3. Step 3: Cross multiply
    13,961.84x = 20,930.40 × 5,190.48
  4. Step 4: Simplify right side
    13,961.84x = 108,638,822.59
  5. Step 5: Solve for x
    x = 108,638,822.59/13,961.84
  6. Step 6: Final answer
    x = 7,781.13

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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.