Home / 3,128.02-4,322.38-2,976.20

Finding the Fourth Proportional to 3,128.02, 4,322.38 and 2,976.20

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Solution

The fourth proportional to 3,128.02, 4,322.38 and 2,976.20 is: 4,112.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.02 : 4,322.38 = 2,976.20 : x
  2. Step 2: Convert to fraction form
    3,128.02/4,322.38 = 2,976.20/x
  3. Step 3: Cross multiply
    3,128.02x = 4,322.38 × 2,976.20
  4. Step 4: Simplify right side
    3,128.02x = 12,864,267.36
  5. Step 5: Solve for x
    x = 12,864,267.36/3,128.02
  6. Step 6: Final answer
    x = 4,112.59

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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.