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Finding the Fourth Proportional to 18,701.92, 25,803.12 and 11,144.48

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Solution

The fourth proportional to 18,701.92, 25,803.12 and 11,144.48 is: 15,376.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,701.92 : 25,803.12 = 11,144.48 : x
  2. Step 2: Convert to fraction form
    18,701.92/25,803.12 = 11,144.48/x
  3. Step 3: Cross multiply
    18,701.92x = 25,803.12 × 11,144.48
  4. Step 4: Simplify right side
    18,701.92x = 287,562,354.78
  5. Step 5: Solve for x
    x = 287,562,354.78/18,701.92
  6. Step 6: Final answer
    x = 15,376.09

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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.