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Finding the Fourth Proportional to 18,639.50, 25,714.03 and 11,081.54

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Solution

The fourth proportional to 18,639.50, 25,714.03 and 11,081.54 is: 15,287.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,639.50 : 25,714.03 = 11,081.54 : x
  2. Step 2: Convert to fraction form
    18,639.50/25,714.03 = 11,081.54/x
  3. Step 3: Cross multiply
    18,639.50x = 25,714.03 × 11,081.54
  4. Step 4: Simplify right side
    18,639.50x = 284,950,937.02
  5. Step 5: Solve for x
    x = 284,950,937.02/18,639.50
  6. Step 6: Final answer
    x = 15,287.48

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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.