Home / 2,947.22-4,415.07-2,121.62

Finding the Fourth Proportional to 2,947.22, 4,415.07 and 2,121.62

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Solution

The fourth proportional to 2,947.22, 4,415.07 and 2,121.62 is: 3,178.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,947.22 : 4,415.07 = 2,121.62 : x
  2. Step 2: Convert to fraction form
    2,947.22/4,415.07 = 2,121.62/x
  3. Step 3: Cross multiply
    2,947.22x = 4,415.07 × 2,121.62
  4. Step 4: Simplify right side
    2,947.22x = 9,367,100.81
  5. Step 5: Solve for x
    x = 9,367,100.81/2,947.22
  6. Step 6: Final answer
    x = 3,178.28

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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.