Home / 13,906.35-19,191.57-7,939.89

Finding the Fourth Proportional to 13,906.35, 19,191.57 and 7,939.89

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Solution

The fourth proportional to 13,906.35, 19,191.57 and 7,939.89 is: 10,957.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,906.35 : 19,191.57 = 7,939.89 : x
  2. Step 2: Convert to fraction form
    13,906.35/19,191.57 = 7,939.89/x
  3. Step 3: Cross multiply
    13,906.35x = 19,191.57 × 7,939.89
  4. Step 4: Simplify right side
    13,906.35x = 152,378,819.07
  5. Step 5: Solve for x
    x = 152,378,819.07/13,906.35
  6. Step 6: Final answer
    x = 10,957.50

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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.