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Finding the Fourth Proportional to 20,005.26, 30,007.80 and 18,787.30

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Solution

The fourth proportional to 20,005.26, 30,007.80 and 18,787.30 is: 28,180.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,005.26 : 30,007.80 = 18,787.30 : x
  2. Step 2: Convert to fraction form
    20,005.26/30,007.80 = 18,787.30/x
  3. Step 3: Cross multiply
    20,005.26x = 30,007.80 × 18,787.30
  4. Step 4: Simplify right side
    20,005.26x = 563,765,540.94
  5. Step 5: Solve for x
    x = 563,765,540.94/20,005.26
  6. Step 6: Final answer
    x = 28,180.87

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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.