Home / 2,156.93-3,220.36-1,921.83

Finding the Fourth Proportional to 2,156.93, 3,220.36 and 1,921.83

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Solution

The fourth proportional to 2,156.93, 3,220.36 and 1,921.83 is: 2,869.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.93 : 3,220.36 = 1,921.83 : x
  2. Step 2: Convert to fraction form
    2,156.93/3,220.36 = 1,921.83/x
  3. Step 3: Cross multiply
    2,156.93x = 3,220.36 × 1,921.83
  4. Step 4: Simplify right side
    2,156.93x = 6,188,967.58
  5. Step 5: Solve for x
    x = 6,188,967.58/2,156.93
  6. Step 6: Final answer
    x = 2,869.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.