Home / 3,240.16-4,472.40-2,121.12

Finding the Fourth Proportional to 3,240.16, 4,472.40 and 2,121.12

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Solution

The fourth proportional to 3,240.16, 4,472.40 and 2,121.12 is: 2,927.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,240.16 : 4,472.40 = 2,121.12 : x
  2. Step 2: Convert to fraction form
    3,240.16/4,472.40 = 2,121.12/x
  3. Step 3: Cross multiply
    3,240.16x = 4,472.40 × 2,121.12
  4. Step 4: Simplify right side
    3,240.16x = 9,486,497.09
  5. Step 5: Solve for x
    x = 9,486,497.09/3,240.16
  6. Step 6: Final answer
    x = 2,927.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.