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Finding the Fourth Proportional to 18,687.52, 25,787.46 and 10,303.84

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Solution

The fourth proportional to 18,687.52, 25,787.46 and 10,303.84 is: 14,218.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.52 : 25,787.46 = 10,303.84 : x
  2. Step 2: Convert to fraction form
    18,687.52/25,787.46 = 10,303.84/x
  3. Step 3: Cross multiply
    18,687.52x = 25,787.46 × 10,303.84
  4. Step 4: Simplify right side
    18,687.52x = 265,709,861.85
  5. Step 5: Solve for x
    x = 265,709,861.85/18,687.52
  6. Step 6: Final answer
    x = 14,218.57

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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.