Home / 2,911.74-4,360.21-1,921.55

Finding the Fourth Proportional to 2,911.74, 4,360.21 and 1,921.55

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Solution

The fourth proportional to 2,911.74, 4,360.21 and 1,921.55 is: 2,877.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.74 : 4,360.21 = 1,921.55 : x
  2. Step 2: Convert to fraction form
    2,911.74/4,360.21 = 1,921.55/x
  3. Step 3: Cross multiply
    2,911.74x = 4,360.21 × 1,921.55
  4. Step 4: Simplify right side
    2,911.74x = 8,378,361.53
  5. Step 5: Solve for x
    x = 8,378,361.53/2,911.74
  6. Step 6: Final answer
    x = 2,877.44

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1.5x scale

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.