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Finding the Fourth Proportional to 13,694.72, 18,898.81 and 8,029.61

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Solution

The fourth proportional to 13,694.72, 18,898.81 and 8,029.61 is: 11,080.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,694.72 : 18,898.81 = 8,029.61 : x
  2. Step 2: Convert to fraction form
    13,694.72/18,898.81 = 8,029.61/x
  3. Step 3: Cross multiply
    13,694.72x = 18,898.81 × 8,029.61
  4. Step 4: Simplify right side
    13,694.72x = 151,749,959.20
  5. Step 5: Solve for x
    x = 151,749,959.20/13,694.72
  6. Step 6: Final answer
    x = 11,080.91

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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.