Home / 9,405.72-12,979.90-5,213.97

Finding the Fourth Proportional to 9,405.72, 12,979.90 and 5,213.97

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Solution

The fourth proportional to 9,405.72, 12,979.90 and 5,213.97 is: 7,195.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,405.72 : 12,979.90 = 5,213.97 : x
  2. Step 2: Convert to fraction form
    9,405.72/12,979.90 = 5,213.97/x
  3. Step 3: Cross multiply
    9,405.72x = 12,979.90 × 5,213.97
  4. Step 4: Simplify right side
    9,405.72x = 67,676,809.20
  5. Step 5: Solve for x
    x = 67,676,809.20/9,405.72
  6. Step 6: Final answer
    x = 7,195.28

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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.