Home / 3,975.21-5,485.81-2,207.16

Finding the Fourth Proportional to 3,975.21, 5,485.81 and 2,207.16

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Solution

The fourth proportional to 3,975.21, 5,485.81 and 2,207.16 is: 3,045.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,975.21 : 5,485.81 = 2,207.16 : x
  2. Step 2: Convert to fraction form
    3,975.21/5,485.81 = 2,207.16/x
  3. Step 3: Cross multiply
    3,975.21x = 5,485.81 × 2,207.16
  4. Step 4: Simplify right side
    3,975.21x = 12,108,060.40
  5. Step 5: Solve for x
    x = 12,108,060.40/3,975.21
  6. Step 6: Final answer
    x = 3,045.89

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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.