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Finding the Fourth Proportional to 12,918.97, 19,378.01 and 3,684.97

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Solution

The fourth proportional to 12,918.97, 19,378.01 and 3,684.97 is: 5,527.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918.97 : 19,378.01 = 3,684.97 : x
  2. Step 2: Convert to fraction form
    12,918.97/19,378.01 = 3,684.97/x
  3. Step 3: Cross multiply
    12,918.97x = 19,378.01 × 3,684.97
  4. Step 4: Simplify right side
    12,918.97x = 71,407,346.28
  5. Step 5: Solve for x
    x = 71,407,346.28/12,918.97
  6. Step 6: Final answer
    x = 5,527.33

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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.