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Finding the Fourth Proportional to 18,903.67, 28,359.72 and 5,757.05

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Solution

The fourth proportional to 18,903.67, 28,359.72 and 5,757.05 is: 8,636.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903.67 : 28,359.72 = 5,757.05 : x
  2. Step 2: Convert to fraction form
    18,903.67/28,359.72 = 5,757.05/x
  3. Step 3: Cross multiply
    18,903.67x = 28,359.72 × 5,757.05
  4. Step 4: Simplify right side
    18,903.67x = 163,268,396.93
  5. Step 5: Solve for x
    x = 163,268,396.93/18,903.67
  6. Step 6: Final answer
    x = 8,636.86

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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.