Home / 13,857.28-19,120.83-7,889.06

Finding the Fourth Proportional to 13,857.28, 19,120.83 and 7,889.06

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Solution

The fourth proportional to 13,857.28, 19,120.83 and 7,889.06 is: 10,885.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,857.28 : 19,120.83 = 7,889.06 : x
  2. Step 2: Convert to fraction form
    13,857.28/19,120.83 = 7,889.06/x
  3. Step 3: Cross multiply
    13,857.28x = 19,120.83 × 7,889.06
  4. Step 4: Simplify right side
    13,857.28x = 150,845,375.12
  5. Step 5: Solve for x
    x = 150,845,375.12/13,857.28
  6. Step 6: Final answer
    x = 10,885.64

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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.