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Finding the Fourth Proportional to 8,661.55, 12,992.33 and 2,087.73

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Solution

The fourth proportional to 8,661.55, 12,992.33 and 2,087.73 is: 3,131.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.55 : 12,992.33 = 2,087.73 : x
  2. Step 2: Convert to fraction form
    8,661.55/12,992.33 = 2,087.73/x
  3. Step 3: Cross multiply
    8,661.55x = 12,992.33 × 2,087.73
  4. Step 4: Simplify right side
    8,661.55x = 27,124,477.11
  5. Step 5: Solve for x
    x = 27,124,477.11/8,661.55
  6. Step 6: Final answer
    x = 3,131.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.