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Finding the Fourth Proportional to 20,606.60, 30,909.92 and 7,455.89

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Solution

The fourth proportional to 20,606.60, 30,909.92 and 7,455.89 is: 11,183.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,606.60 : 30,909.92 = 7,455.89 : x
  2. Step 2: Convert to fraction form
    20,606.60/30,909.92 = 7,455.89/x
  3. Step 3: Cross multiply
    20,606.60x = 30,909.92 × 7,455.89
  4. Step 4: Simplify right side
    20,606.60x = 230,460,771.60
  5. Step 5: Solve for x
    x = 230,460,771.60/20,606.60
  6. Step 6: Final answer
    x = 11,183.84

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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.