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Finding the Fourth Proportional to 20,554.70, 30,818.55 and 8,067.20

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Solution

The fourth proportional to 20,554.70, 30,818.55 and 8,067.20 is: 12,095.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,554.70 : 30,818.55 = 8,067.20 : x
  2. Step 2: Convert to fraction form
    20,554.70/30,818.55 = 8,067.20/x
  3. Step 3: Cross multiply
    20,554.70x = 30,818.55 × 8,067.20
  4. Step 4: Simplify right side
    20,554.70x = 248,619,406.56
  5. Step 5: Solve for x
    x = 248,619,406.56/20,554.70
  6. Step 6: Final answer
    x = 12,095.50

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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.