Home / 2,121.77-3,181.47-1,685.84

Finding the Fourth Proportional to 2,121.77, 3,181.47 and 1,685.84

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Solution

The fourth proportional to 2,121.77, 3,181.47 and 1,685.84 is: 2,527.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.77 : 3,181.47 = 1,685.84 : x
  2. Step 2: Convert to fraction form
    2,121.77/3,181.47 = 1,685.84/x
  3. Step 3: Cross multiply
    2,121.77x = 3,181.47 × 1,685.84
  4. Step 4: Simplify right side
    2,121.77x = 5,363,433.48
  5. Step 5: Solve for x
    x = 5,363,433.48/2,121.77
  6. Step 6: Final answer
    x = 2,527.82

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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.