Home / 3,947.04-5,920.24-2,215.20

Finding the Fourth Proportional to 3,947.04, 5,920.24 and 2,215.20

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Solution

The fourth proportional to 3,947.04, 5,920.24 and 2,215.20 is: 3,322.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.04 : 5,920.24 = 2,215.20 : x
  2. Step 2: Convert to fraction form
    3,947.04/5,920.24 = 2,215.20/x
  3. Step 3: Cross multiply
    3,947.04x = 5,920.24 × 2,215.20
  4. Step 4: Simplify right side
    3,947.04x = 13,114,515.65
  5. Step 5: Solve for x
    x = 13,114,515.65/3,947.04
  6. Step 6: Final answer
    x = 3,322.62

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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.