Home / 3,172.08-4,377.80-1,993.20

Finding the Fourth Proportional to 3,172.08, 4,377.80 and 1,993.20

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Solution

The fourth proportional to 3,172.08, 4,377.80 and 1,993.20 is: 2,750.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,172.08 : 4,377.80 = 1,993.20 : x
  2. Step 2: Convert to fraction form
    3,172.08/4,377.80 = 1,993.20/x
  3. Step 3: Cross multiply
    3,172.08x = 4,377.80 × 1,993.20
  4. Step 4: Simplify right side
    3,172.08x = 8,725,830.96
  5. Step 5: Solve for x
    x = 8,725,830.96/3,172.08
  6. Step 6: Final answer
    x = 2,750.82

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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.