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Finding the Fourth Proportional to 12,855.39, 17,760.11 and 10,986.32

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Solution

The fourth proportional to 12,855.39, 17,760.11 and 10,986.32 is: 15,177.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,855.39 : 17,760.11 = 10,986.32 : x
  2. Step 2: Convert to fraction form
    12,855.39/17,760.11 = 10,986.32/x
  3. Step 3: Cross multiply
    12,855.39x = 17,760.11 × 10,986.32
  4. Step 4: Simplify right side
    12,855.39x = 195,118,107.96
  5. Step 5: Solve for x
    x = 195,118,107.96/12,855.39
  6. Step 6: Final answer
    x = 15,177.92

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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.