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Finding the Fourth Proportional to 18,912.91, 28,373.58 and 5,766.31

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Solution

The fourth proportional to 18,912.91, 28,373.58 and 5,766.31 is: 8,650.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,912.91 : 28,373.58 = 5,766.31 : x
  2. Step 2: Convert to fraction form
    18,912.91/28,373.58 = 5,766.31/x
  3. Step 3: Cross multiply
    18,912.91x = 28,373.58 × 5,766.31
  4. Step 4: Simplify right side
    18,912.91x = 163,610,858.09
  5. Step 5: Solve for x
    x = 163,610,858.09/18,912.91
  6. Step 6: Final answer
    x = 8,650.75

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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.