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Finding the Fourth Proportional to 18,461.52, 27,690.06 and 5,135.52

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Solution

The fourth proportional to 18,461.52, 27,690.06 and 5,135.52 is: 7,702.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,461.52 : 27,690.06 = 5,135.52 : x
  2. Step 2: Convert to fraction form
    18,461.52/27,690.06 = 5,135.52/x
  3. Step 3: Cross multiply
    18,461.52x = 27,690.06 × 5,135.52
  4. Step 4: Simplify right side
    18,461.52x = 142,202,856.93
  5. Step 5: Solve for x
    x = 142,202,856.93/18,461.52
  6. Step 6: Final answer
    x = 7,702.66

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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.