Home / 3,939.64-5,434.64-2,345.18

Finding the Fourth Proportional to 3,939.64, 5,434.64 and 2,345.18

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Solution

The fourth proportional to 3,939.64, 5,434.64 and 2,345.18 is: 3,235.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.64 : 5,434.64 = 2,345.18 : x
  2. Step 2: Convert to fraction form
    3,939.64/5,434.64 = 2,345.18/x
  3. Step 3: Cross multiply
    3,939.64x = 5,434.64 × 2,345.18
  4. Step 4: Simplify right side
    3,939.64x = 12,745,207.41
  5. Step 5: Solve for x
    x = 12,745,207.41/3,939.64
  6. Step 6: Final answer
    x = 3,235.12

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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.