Home / 3,947.52-5,918.40-1,998.72

Finding the Fourth Proportional to 3,947.52, 5,918.40 and 1,998.72

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Solution

The fourth proportional to 3,947.52, 5,918.40 and 1,998.72 is: 2,996.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.52 : 5,918.40 = 1,998.72 : x
  2. Step 2: Convert to fraction form
    3,947.52/5,918.40 = 1,998.72/x
  3. Step 3: Cross multiply
    3,947.52x = 5,918.40 × 1,998.72
  4. Step 4: Simplify right side
    3,947.52x = 11,829,224.45
  5. Step 5: Solve for x
    x = 11,829,224.45/3,947.52
  6. Step 6: Final answer
    x = 2,996.62

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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.