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Finding the Fourth Proportional to 20,488.56, 30,736.80 and 8,008.08

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Solution

The fourth proportional to 20,488.56, 30,736.80 and 8,008.08 is: 12,013.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.56 : 30,736.80 = 8,008.08 : x
  2. Step 2: Convert to fraction form
    20,488.56/30,736.80 = 8,008.08/x
  3. Step 3: Cross multiply
    20,488.56x = 30,736.80 × 8,008.08
  4. Step 4: Simplify right side
    20,488.56x = 246,142,753.34
  5. Step 5: Solve for x
    x = 246,142,753.34/20,488.56
  6. Step 6: Final answer
    x = 12,013.67

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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.