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Finding the Fourth Proportional to 18,687.82, 28,036.47 and 6,207.91

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Solution

The fourth proportional to 18,687.82, 28,036.47 and 6,207.91 is: 9,313.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.82 : 28,036.47 = 6,207.91 : x
  2. Step 2: Convert to fraction form
    18,687.82/28,036.47 = 6,207.91/x
  3. Step 3: Cross multiply
    18,687.82x = 28,036.47 × 6,207.91
  4. Step 4: Simplify right side
    18,687.82x = 174,047,882.48
  5. Step 5: Solve for x
    x = 174,047,882.48/18,687.82
  6. Step 6: Final answer
    x = 9,313.44

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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.