Home / 13,891.20-19,165.11-7,918.56

Finding the Fourth Proportional to 13,891.20, 19,165.11 and 7,918.56

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Solution

The fourth proportional to 13,891.20, 19,165.11 and 7,918.56 is: 10,924.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,891.20 : 19,165.11 = 7,918.56 : x
  2. Step 2: Convert to fraction form
    13,891.20/19,165.11 = 7,918.56/x
  3. Step 3: Cross multiply
    13,891.20x = 19,165.11 × 7,918.56
  4. Step 4: Simplify right side
    13,891.20x = 151,760,043.75
  5. Step 5: Solve for x
    x = 151,760,043.75/13,891.20
  6. Step 6: Final answer
    x = 10,924.91

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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.