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Finding the Fourth Proportional to 13,906.76, 19,191.20 and 7,619.13

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Solution

The fourth proportional to 13,906.76, 19,191.20 and 7,619.13 is: 10,514.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,906.76 : 19,191.20 = 7,619.13 : x
  2. Step 2: Convert to fraction form
    13,906.76/19,191.20 = 7,619.13/x
  3. Step 3: Cross multiply
    13,906.76x = 19,191.20 × 7,619.13
  4. Step 4: Simplify right side
    13,906.76x = 146,220,209.56
  5. Step 5: Solve for x
    x = 146,220,209.56/13,906.76
  6. Step 6: Final answer
    x = 10,514.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.