Home / 2,076.19-3,113.46-921.13

Finding the Fourth Proportional to 2,076.19, 3,113.46 and 921.13

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Solution

The fourth proportional to 2,076.19, 3,113.46 and 921.13 is: 1,381.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,076.19 : 3,113.46 = 921.13 : x
  2. Step 2: Convert to fraction form
    2,076.19/3,113.46 = 921.13/x
  3. Step 3: Cross multiply
    2,076.19x = 3,113.46 × 921.13
  4. Step 4: Simplify right side
    2,076.19x = 2,867,901.41
  5. Step 5: Solve for x
    x = 2,867,901.41/2,076.19
  6. Step 6: Final answer
    x = 1,381.33

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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.