Home / 2,178.12-2,999.25-1,969.74

Finding the Fourth Proportional to 2,178.12, 2,999.25 and 1,969.74

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Solution

The fourth proportional to 2,178.12, 2,999.25 and 1,969.74 is: 2,712.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.12 : 2,999.25 = 1,969.74 : x
  2. Step 2: Convert to fraction form
    2,178.12/2,999.25 = 1,969.74/x
  3. Step 3: Cross multiply
    2,178.12x = 2,999.25 × 1,969.74
  4. Step 4: Simplify right side
    2,178.12x = 5,907,742.70
  5. Step 5: Solve for x
    x = 5,907,742.70/2,178.12
  6. Step 6: Final answer
    x = 2,712.31

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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.