Home / 3,180.48-4,389.53-1,921.72

Finding the Fourth Proportional to 3,180.48, 4,389.53 and 1,921.72

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Solution

The fourth proportional to 3,180.48, 4,389.53 and 1,921.72 is: 2,652.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,180.48 : 4,389.53 = 1,921.72 : x
  2. Step 2: Convert to fraction form
    3,180.48/4,389.53 = 1,921.72/x
  3. Step 3: Cross multiply
    3,180.48x = 4,389.53 × 1,921.72
  4. Step 4: Simplify right side
    3,180.48x = 8,435,439.17
  5. Step 5: Solve for x
    x = 8,435,439.17/3,180.48
  6. Step 6: Final answer
    x = 2,652.25

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1.5x scale

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.