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Finding the Fourth Proportional to 15,391.92, 21,231 and 10,674.48

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Solution

The fourth proportional to 15,391.92, 21,231 and 10,674.48 is: 14,723.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,391.92 : 21,231 = 10,674.48 : x
  2. Step 2: Convert to fraction form
    15,391.92/21,231 = 10,674.48/x
  3. Step 3: Cross multiply
    15,391.92x = 21,231 × 10,674.48
  4. Step 4: Simplify right side
    15,391.92x = 226,629,884.88
  5. Step 5: Solve for x
    x = 226,629,884.88/15,391.92
  6. Step 6: Final answer
    x = 14,723.95

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1.5x scale

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.