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Finding the Fourth Proportional to 18,807.72, 28,180.80 and 11,414.46

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Solution

The fourth proportional to 18,807.72, 28,180.80 and 11,414.46 is: 17,103.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,807.72 : 28,180.80 = 11,414.46 : x
  2. Step 2: Convert to fraction form
    18,807.72/28,180.80 = 11,414.46/x
  3. Step 3: Cross multiply
    18,807.72x = 28,180.80 × 11,414.46
  4. Step 4: Simplify right side
    18,807.72x = 321,668,614.37
  5. Step 5: Solve for x
    x = 321,668,614.37/18,807.72
  6. Step 6: Final answer
    x = 17,103.01

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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.