Home / 3,309.28-4,563.12-2,128.72

Finding the Fourth Proportional to 3,309.28, 4,563.12 and 2,128.72

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Solution

The fourth proportional to 3,309.28, 4,563.12 and 2,128.72 is: 2,935.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,309.28 : 4,563.12 = 2,128.72 : x
  2. Step 2: Convert to fraction form
    3,309.28/4,563.12 = 2,128.72/x
  3. Step 3: Cross multiply
    3,309.28x = 4,563.12 × 2,128.72
  4. Step 4: Simplify right side
    3,309.28x = 9,713,604.81
  5. Step 5: Solve for x
    x = 9,713,604.81/3,309.28
  6. Step 6: Final answer
    x = 2,935.26

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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.