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Finding the Fourth Proportional to 11,878.78, 17,818.31 and 3,114.58

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Solution

The fourth proportional to 11,878.78, 17,818.31 and 3,114.58 is: 4,671.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,878.78 : 17,818.31 = 3,114.58 : x
  2. Step 2: Convert to fraction form
    11,878.78/17,818.31 = 3,114.58/x
  3. Step 3: Cross multiply
    11,878.78x = 17,818.31 × 3,114.58
  4. Step 4: Simplify right side
    11,878.78x = 55,496,536.39
  5. Step 5: Solve for x
    x = 55,496,536.39/11,878.78
  6. Step 6: Final answer
    x = 4,671.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.