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Finding the Fourth Proportional to 18,603.90, 27,908.19 and 6,125.40

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Solution

The fourth proportional to 18,603.90, 27,908.19 and 6,125.40 is: 9,188.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,603.90 : 27,908.19 = 6,125.40 : x
  2. Step 2: Convert to fraction form
    18,603.90/27,908.19 = 6,125.40/x
  3. Step 3: Cross multiply
    18,603.90x = 27,908.19 × 6,125.40
  4. Step 4: Simplify right side
    18,603.90x = 170,948,827.03
  5. Step 5: Solve for x
    x = 170,948,827.03/18,603.90
  6. Step 6: Final answer
    x = 9,188.87

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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.