Home / 13,818.36-19,072.41-8,781.60

Finding the Fourth Proportional to 13,818.36, 19,072.41 and 8,781.60

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Solution

The fourth proportional to 13,818.36, 19,072.41 and 8,781.60 is: 12,120.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,818.36 : 19,072.41 = 8,781.60 : x
  2. Step 2: Convert to fraction form
    13,818.36/19,072.41 = 8,781.60/x
  3. Step 3: Cross multiply
    13,818.36x = 19,072.41 × 8,781.60
  4. Step 4: Simplify right side
    13,818.36x = 167,486,260.91
  5. Step 5: Solve for x
    x = 167,486,260.91/13,818.36
  6. Step 6: Final answer
    x = 12,120.56

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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.