Home / 13,905.84-19,190.87-7,939.38

Finding the Fourth Proportional to 13,905.84, 19,190.87 and 7,939.38

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Solution

The fourth proportional to 13,905.84, 19,190.87 and 7,939.38 is: 10,956.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,905.84 : 19,190.87 = 7,939.38 : x
  2. Step 2: Convert to fraction form
    13,905.84/19,190.87 = 7,939.38/x
  3. Step 3: Cross multiply
    13,905.84x = 19,190.87 × 7,939.38
  4. Step 4: Simplify right side
    13,905.84x = 152,363,716.16
  5. Step 5: Solve for x
    x = 152,363,716.16/13,905.84
  6. Step 6: Final answer
    x = 10,956.81

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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.