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Finding the Fourth Proportional to 27,563.40, 41,247.90 and 18,815.40

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Solution

The fourth proportional to 27,563.40, 41,247.90 and 18,815.40 is: 28,156.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,563.40 : 41,247.90 = 18,815.40 : x
  2. Step 2: Convert to fraction form
    27,563.40/41,247.90 = 18,815.40/x
  3. Step 3: Cross multiply
    27,563.40x = 41,247.90 × 18,815.40
  4. Step 4: Simplify right side
    27,563.40x = 776,095,737.66
  5. Step 5: Solve for x
    x = 776,095,737.66/27,563.40
  6. Step 6: Final answer
    x = 28,156.75

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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.