Home / 13,818.39-19,072.46-8,781.63

Finding the Fourth Proportional to 13,818.39, 19,072.46 and 8,781.63

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Solution

The fourth proportional to 13,818.39, 19,072.46 and 8,781.63 is: 12,120.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,818.39 : 19,072.46 = 8,781.63 : x
  2. Step 2: Convert to fraction form
    13,818.39/19,072.46 = 8,781.63/x
  3. Step 3: Cross multiply
    13,818.39x = 19,072.46 × 8,781.63
  4. Step 4: Simplify right side
    13,818.39x = 167,487,286.91
  5. Step 5: Solve for x
    x = 167,487,286.91/13,818.39
  6. Step 6: Final answer
    x = 12,120.61

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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.