Home / 3,112.40-4,283.88-2,179.28

Finding the Fourth Proportional to 3,112.40, 4,283.88 and 2,179.28

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Solution

The fourth proportional to 3,112.40, 4,283.88 and 2,179.28 is: 2,999.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,112.40 : 4,283.88 = 2,179.28 : x
  2. Step 2: Convert to fraction form
    3,112.40/4,283.88 = 2,179.28/x
  3. Step 3: Cross multiply
    3,112.40x = 4,283.88 × 2,179.28
  4. Step 4: Simplify right side
    3,112.40x = 9,335,774.01
  5. Step 5: Solve for x
    x = 9,335,774.01/3,112.40
  6. Step 6: Final answer
    x = 2,999.54

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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.