Home / 31,175.58-42,988.27-21,086.53

Finding the Fourth Proportional to 31,175.58, 42,988.27 and 21,086.53

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Solution

The fourth proportional to 31,175.58, 42,988.27 and 21,086.53 is: 29,076.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,175.58 : 42,988.27 = 21,086.53 : x
  2. Step 2: Convert to fraction form
    31,175.58/42,988.27 = 21,086.53/x
  3. Step 3: Cross multiply
    31,175.58x = 42,988.27 × 21,086.53
  4. Step 4: Simplify right side
    31,175.58x = 906,473,324.35
  5. Step 5: Solve for x
    x = 906,473,324.35/31,175.58
  6. Step 6: Final answer
    x = 29,076.39

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.