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Finding the Fourth Proportional to 18,420.76, 27,609.50 and 8,539.24

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Solution

The fourth proportional to 18,420.76, 27,609.50 and 8,539.24 is: 12,798.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.76 : 27,609.50 = 8,539.24 : x
  2. Step 2: Convert to fraction form
    18,420.76/27,609.50 = 8,539.24/x
  3. Step 3: Cross multiply
    18,420.76x = 27,609.50 × 8,539.24
  4. Step 4: Simplify right side
    18,420.76x = 235,764,104.08
  5. Step 5: Solve for x
    x = 235,764,104.08/18,420.76
  6. Step 6: Final answer
    x = 12,798.83

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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.