Home / 3,980.19-5,491.83-2,561.64

Finding the Fourth Proportional to 3,980.19, 5,491.83 and 2,561.64

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Solution

The fourth proportional to 3,980.19, 5,491.83 and 2,561.64 is: 3,534.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.19 : 5,491.83 = 2,561.64 : x
  2. Step 2: Convert to fraction form
    3,980.19/5,491.83 = 2,561.64/x
  3. Step 3: Cross multiply
    3,980.19x = 5,491.83 × 2,561.64
  4. Step 4: Simplify right side
    3,980.19x = 14,068,091.40
  5. Step 5: Solve for x
    x = 14,068,091.40/3,980.19
  6. Step 6: Final answer
    x = 3,534.53

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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.