Home / 2,121.39-3,165.08-1,809.68

Finding the Fourth Proportional to 2,121.39, 3,165.08 and 1,809.68

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Solution

The fourth proportional to 2,121.39, 3,165.08 and 1,809.68 is: 2,700.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.39 : 3,165.08 = 1,809.68 : x
  2. Step 2: Convert to fraction form
    2,121.39/3,165.08 = 1,809.68/x
  3. Step 3: Cross multiply
    2,121.39x = 3,165.08 × 1,809.68
  4. Step 4: Simplify right side
    2,121.39x = 5,727,757.10
  5. Step 5: Solve for x
    x = 5,727,757.10/2,121.39
  6. Step 6: Final answer
    x = 2,700.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.