Home / 2,126.10-3,185-1,393.46

Finding the Fourth Proportional to 2,126.10, 3,185 and 1,393.46

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Solution

The fourth proportional to 2,126.10, 3,185 and 1,393.46 is: 2,087.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.10 : 3,185 = 1,393.46 : x
  2. Step 2: Convert to fraction form
    2,126.10/3,185 = 1,393.46/x
  3. Step 3: Cross multiply
    2,126.10x = 3,185 × 1,393.46
  4. Step 4: Simplify right side
    2,126.10x = 4,438,170.10
  5. Step 5: Solve for x
    x = 4,438,170.10/2,126.10
  6. Step 6: Final answer
    x = 2,087.47

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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.