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Finding the Fourth Proportional to 12,179.28, 18,268.86 and 2,945.28

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Solution

The fourth proportional to 12,179.28, 18,268.86 and 2,945.28 is: 4,417.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,179.28 : 18,268.86 = 2,945.28 : x
  2. Step 2: Convert to fraction form
    12,179.28/18,268.86 = 2,945.28/x
  3. Step 3: Cross multiply
    12,179.28x = 18,268.86 × 2,945.28
  4. Step 4: Simplify right side
    12,179.28x = 53,806,907.98
  5. Step 5: Solve for x
    x = 53,806,907.98/12,179.28
  6. Step 6: Final answer
    x = 4,417.91

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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.