Home / 3,939.56-5,436.51-2,146.96

Finding the Fourth Proportional to 3,939.56, 5,436.51 and 2,146.96

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Solution

The fourth proportional to 3,939.56, 5,436.51 and 2,146.96 is: 2,962.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.56 : 5,436.51 = 2,146.96 : x
  2. Step 2: Convert to fraction form
    3,939.56/5,436.51 = 2,146.96/x
  3. Step 3: Cross multiply
    3,939.56x = 5,436.51 × 2,146.96
  4. Step 4: Simplify right side
    3,939.56x = 11,671,969.51
  5. Step 5: Solve for x
    x = 11,671,969.51/3,939.56
  6. Step 6: Final answer
    x = 2,962.76

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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.