Home / 2,215.81-3,059.13-1,969.80

Finding the Fourth Proportional to 2,215.81, 3,059.13 and 1,969.80

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Solution

The fourth proportional to 2,215.81, 3,059.13 and 1,969.80 is: 2,719.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.81 : 3,059.13 = 1,969.80 : x
  2. Step 2: Convert to fraction form
    2,215.81/3,059.13 = 1,969.80/x
  3. Step 3: Cross multiply
    2,215.81x = 3,059.13 × 1,969.80
  4. Step 4: Simplify right side
    2,215.81x = 6,025,874.27
  5. Step 5: Solve for x
    x = 6,025,874.27/2,215.81
  6. Step 6: Final answer
    x = 2,719.49

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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.