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Finding the Fourth Proportional to 11,373, 15,694.90 and 6,405

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Solution

The fourth proportional to 11,373, 15,694.90 and 6,405 is: 8,838.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,373 : 15,694.90 = 6,405 : x
  2. Step 2: Convert to fraction form
    11,373/15,694.90 = 6,405/x
  3. Step 3: Cross multiply
    11,373x = 15,694.90 × 6,405
  4. Step 4: Simplify right side
    11,373x = 100,525,834.50
  5. Step 5: Solve for x
    x = 100,525,834.50/11,373
  6. Step 6: Final answer
    x = 8,838.99

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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.