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Finding the Fourth Proportional to 20,462.92, 30,692.99 and 7,980.62

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Solution

The fourth proportional to 20,462.92, 30,692.99 and 7,980.62 is: 11,970.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,462.92 : 30,692.99 = 7,980.62 : x
  2. Step 2: Convert to fraction form
    20,462.92/30,692.99 = 7,980.62/x
  3. Step 3: Cross multiply
    20,462.92x = 30,692.99 × 7,980.62
  4. Step 4: Simplify right side
    20,462.92x = 244,948,956.34
  5. Step 5: Solve for x
    x = 244,948,956.34/20,462.92
  6. Step 6: Final answer
    x = 11,970.38

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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.