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Finding the Fourth Proportional to 18,763.50, 25,894.44 and 10,380

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Solution

The fourth proportional to 18,763.50, 25,894.44 and 10,380 is: 14,324.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,763.50 : 25,894.44 = 10,380 : x
  2. Step 2: Convert to fraction form
    18,763.50/25,894.44 = 10,380/x
  3. Step 3: Cross multiply
    18,763.50x = 25,894.44 × 10,380
  4. Step 4: Simplify right side
    18,763.50x = 268,784,287.20
  5. Step 5: Solve for x
    x = 268,784,287.20/18,763.50
  6. Step 6: Final answer
    x = 14,324.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.