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Finding the Fourth Proportional to 20,661.93, 30,992.90 and 8,184.87

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Solution

The fourth proportional to 20,661.93, 30,992.90 and 8,184.87 is: 12,277.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.93 : 30,992.90 = 8,184.87 : x
  2. Step 2: Convert to fraction form
    20,661.93/30,992.90 = 8,184.87/x
  3. Step 3: Cross multiply
    20,661.93x = 30,992.90 × 8,184.87
  4. Step 4: Simplify right side
    20,661.93x = 253,672,816.50
  5. Step 5: Solve for x
    x = 253,672,816.50/20,661.93
  6. Step 6: Final answer
    x = 12,277.31

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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.