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Finding the Fourth Proportional to 18,727.91, 28,092 and 4,688.18

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Solution

The fourth proportional to 18,727.91, 28,092 and 4,688.18 is: 7,032.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,727.91 : 28,092 = 4,688.18 : x
  2. Step 2: Convert to fraction form
    18,727.91/28,092 = 4,688.18/x
  3. Step 3: Cross multiply
    18,727.91x = 28,092 × 4,688.18
  4. Step 4: Simplify right side
    18,727.91x = 131,700,352.56
  5. Step 5: Solve for x
    x = 131,700,352.56/18,727.91
  6. Step 6: Final answer
    x = 7,032.30

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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.