Home / 3,979.36-5,491.69-2,211.13

Finding the Fourth Proportional to 3,979.36, 5,491.69 and 2,211.13

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Solution

The fourth proportional to 3,979.36, 5,491.69 and 2,211.13 is: 3,051.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.36 : 5,491.69 = 2,211.13 : x
  2. Step 2: Convert to fraction form
    3,979.36/5,491.69 = 2,211.13/x
  3. Step 3: Cross multiply
    3,979.36x = 5,491.69 × 2,211.13
  4. Step 4: Simplify right side
    3,979.36x = 12,142,840.51
  5. Step 5: Solve for x
    x = 12,142,840.51/3,979.36
  6. Step 6: Final answer
    x = 3,051.46

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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.