Home / 2,921.02-4,032.50-1,981.78

Finding the Fourth Proportional to 2,921.02, 4,032.50 and 1,981.78

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Solution

The fourth proportional to 2,921.02, 4,032.50 and 1,981.78 is: 2,735.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.02 : 4,032.50 = 1,981.78 : x
  2. Step 2: Convert to fraction form
    2,921.02/4,032.50 = 1,981.78/x
  3. Step 3: Cross multiply
    2,921.02x = 4,032.50 × 1,981.78
  4. Step 4: Simplify right side
    2,921.02x = 7,991,527.85
  5. Step 5: Solve for x
    x = 7,991,527.85/2,921.02
  6. Step 6: Final answer
    x = 2,735.87

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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.