Home / 1,538.39-2,121.31-1,096.13

Finding the Fourth Proportional to 1,538.39, 2,121.31 and 1,096.13

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Solution

The fourth proportional to 1,538.39, 2,121.31 and 1,096.13 is: 1,511.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.39 : 2,121.31 = 1,096.13 : x
  2. Step 2: Convert to fraction form
    1,538.39/2,121.31 = 1,096.13/x
  3. Step 3: Cross multiply
    1,538.39x = 2,121.31 × 1,096.13
  4. Step 4: Simplify right side
    1,538.39x = 2,325,231.53
  5. Step 5: Solve for x
    x = 2,325,231.53/1,538.39
  6. Step 6: Final answer
    x = 1,511.47

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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.