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Finding the Fourth Proportional to 13,706.06, 18,917.91 and 8,937.90

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Solution

The fourth proportional to 13,706.06, 18,917.91 and 8,937.90 is: 12,336.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,706.06 : 18,917.91 = 8,937.90 : x
  2. Step 2: Convert to fraction form
    13,706.06/18,917.91 = 8,937.90/x
  3. Step 3: Cross multiply
    13,706.06x = 18,917.91 × 8,937.90
  4. Step 4: Simplify right side
    13,706.06x = 169,086,387.79
  5. Step 5: Solve for x
    x = 169,086,387.79/13,706.06
  6. Step 6: Final answer
    x = 12,336.61

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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.