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Finding the Fourth Proportional to 18,958.74, 28,434.87 and 5,104.50

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Solution

The fourth proportional to 18,958.74, 28,434.87 and 5,104.50 is: 7,655.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,958.74 : 28,434.87 = 5,104.50 : x
  2. Step 2: Convert to fraction form
    18,958.74/28,434.87 = 5,104.50/x
  3. Step 3: Cross multiply
    18,958.74x = 28,434.87 × 5,104.50
  4. Step 4: Simplify right side
    18,958.74x = 145,145,793.92
  5. Step 5: Solve for x
    x = 145,145,793.92/18,958.74
  6. Step 6: Final answer
    x = 7,655.88

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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.