Home / 13,855.36-19,120.12-7,886.90

Finding the Fourth Proportional to 13,855.36, 19,120.12 and 7,886.90

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Solution

The fourth proportional to 13,855.36, 19,120.12 and 7,886.90 is: 10,883.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.36 : 19,120.12 = 7,886.90 : x
  2. Step 2: Convert to fraction form
    13,855.36/19,120.12 = 7,886.90/x
  3. Step 3: Cross multiply
    13,855.36x = 19,120.12 × 7,886.90
  4. Step 4: Simplify right side
    13,855.36x = 150,798,474.43
  5. Step 5: Solve for x
    x = 150,798,474.43/13,855.36
  6. Step 6: Final answer
    x = 10,883.76

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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.