Home / 3,123.11-4,679.19-2,784.12

Finding the Fourth Proportional to 3,123.11, 4,679.19 and 2,784.12

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Solution

The fourth proportional to 3,123.11, 4,679.19 and 2,784.12 is: 4,171.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.11 : 4,679.19 = 2,784.12 : x
  2. Step 2: Convert to fraction form
    3,123.11/4,679.19 = 2,784.12/x
  3. Step 3: Cross multiply
    3,123.11x = 4,679.19 × 2,784.12
  4. Step 4: Simplify right side
    3,123.11x = 13,027,426.46
  5. Step 5: Solve for x
    x = 13,027,426.46/3,123.11
  6. Step 6: Final answer
    x = 4,171.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.