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Finding the Fourth Proportional to 13,690.46, 18,896.88 and 8,026.44

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Solution

The fourth proportional to 13,690.46, 18,896.88 and 8,026.44 is: 11,078.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.46 : 18,896.88 = 8,026.44 : x
  2. Step 2: Convert to fraction form
    13,690.46/18,896.88 = 8,026.44/x
  3. Step 3: Cross multiply
    13,690.46x = 18,896.88 × 8,026.44
  4. Step 4: Simplify right side
    13,690.46x = 151,674,632.74
  5. Step 5: Solve for x
    x = 151,674,632.74/13,690.46
  6. Step 6: Final answer
    x = 11,078.85

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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.