Home / 3,111.96-4,296.06-2,178.84

Finding the Fourth Proportional to 3,111.96, 4,296.06 and 2,178.84

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Solution

The fourth proportional to 3,111.96, 4,296.06 and 2,178.84 is: 3,007.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.96 : 4,296.06 = 2,178.84 : x
  2. Step 2: Convert to fraction form
    3,111.96/4,296.06 = 2,178.84/x
  3. Step 3: Cross multiply
    3,111.96x = 4,296.06 × 2,178.84
  4. Step 4: Simplify right side
    3,111.96x = 9,360,427.37
  5. Step 5: Solve for x
    x = 9,360,427.37/3,111.96
  6. Step 6: Final answer
    x = 3,007.89

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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.