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Finding the Fourth Proportional to 18,689.94, 28,035.02 and 5,542.42

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Solution

The fourth proportional to 18,689.94, 28,035.02 and 5,542.42 is: 8,313.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,689.94 : 28,035.02 = 5,542.42 : x
  2. Step 2: Convert to fraction form
    18,689.94/28,035.02 = 5,542.42/x
  3. Step 3: Cross multiply
    18,689.94x = 28,035.02 × 5,542.42
  4. Step 4: Simplify right side
    18,689.94x = 155,381,855.55
  5. Step 5: Solve for x
    x = 155,381,855.55/18,689.94
  6. Step 6: Final answer
    x = 8,313.66

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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.