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Finding the Fourth Proportional to 18,625.17, 27,931.81 and 6,142.86

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Solution

The fourth proportional to 18,625.17, 27,931.81 and 6,142.86 is: 9,212.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,625.17 : 27,931.81 = 6,142.86 : x
  2. Step 2: Convert to fraction form
    18,625.17/27,931.81 = 6,142.86/x
  3. Step 3: Cross multiply
    18,625.17x = 27,931.81 × 6,142.86
  4. Step 4: Simplify right side
    18,625.17x = 171,581,198.38
  5. Step 5: Solve for x
    x = 171,581,198.38/18,625.17
  6. Step 6: Final answer
    x = 9,212.33

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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.