Home / 2,120.19-3,180.35-1,810.09

Finding the Fourth Proportional to 2,120.19, 3,180.35 and 1,810.09

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Solution

The fourth proportional to 2,120.19, 3,180.35 and 1,810.09 is: 2,715.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.19 : 3,180.35 = 1,810.09 : x
  2. Step 2: Convert to fraction form
    2,120.19/3,180.35 = 1,810.09/x
  3. Step 3: Cross multiply
    2,120.19x = 3,180.35 × 1,810.09
  4. Step 4: Simplify right side
    2,120.19x = 5,756,719.73
  5. Step 5: Solve for x
    x = 5,756,719.73/2,120.19
  6. Step 6: Final answer
    x = 2,715.19

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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.