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Finding the Fourth Proportional to 18,661.38, 27,992.16 and 4,810.38

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Solution

The fourth proportional to 18,661.38, 27,992.16 and 4,810.38 is: 7,215.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,661.38 : 27,992.16 = 4,810.38 : x
  2. Step 2: Convert to fraction form
    18,661.38/27,992.16 = 4,810.38/x
  3. Step 3: Cross multiply
    18,661.38x = 27,992.16 × 4,810.38
  4. Step 4: Simplify right side
    18,661.38x = 134,652,926.62
  5. Step 5: Solve for x
    x = 134,652,926.62/18,661.38
  6. Step 6: Final answer
    x = 7,215.59

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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.