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Finding the Fourth Proportional to 13,920.54, 20,893.05 and 7,351.14

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Solution

The fourth proportional to 13,920.54, 20,893.05 and 7,351.14 is: 11,033.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.54 : 20,893.05 = 7,351.14 : x
  2. Step 2: Convert to fraction form
    13,920.54/20,893.05 = 7,351.14/x
  3. Step 3: Cross multiply
    13,920.54x = 20,893.05 × 7,351.14
  4. Step 4: Simplify right side
    13,920.54x = 153,587,735.58
  5. Step 5: Solve for x
    x = 153,587,735.58/13,920.54
  6. Step 6: Final answer
    x = 11,033.17

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1.5x scale

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.