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Finding the Fourth Proportional to 18,807.96, 28,177.35 and 11,786.66

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Solution

The fourth proportional to 18,807.96, 28,177.35 and 11,786.66 is: 17,658.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,807.96 : 28,177.35 = 11,786.66 : x
  2. Step 2: Convert to fraction form
    18,807.96/28,177.35 = 11,786.66/x
  3. Step 3: Cross multiply
    18,807.96x = 28,177.35 × 11,786.66
  4. Step 4: Simplify right side
    18,807.96x = 332,116,989.53
  5. Step 5: Solve for x
    x = 332,116,989.53/18,807.96
  6. Step 6: Final answer
    x = 17,658.32

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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.