Home / 7,983.77-11,979.36-4,090.91

Finding the Fourth Proportional to 7,983.77, 11,979.36 and 4,090.91

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Solution

The fourth proportional to 7,983.77, 11,979.36 and 4,090.91 is: 6,138.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,983.77 : 11,979.36 = 4,090.91 : x
  2. Step 2: Convert to fraction form
    7,983.77/11,979.36 = 4,090.91/x
  3. Step 3: Cross multiply
    7,983.77x = 11,979.36 × 4,090.91
  4. Step 4: Simplify right side
    7,983.77x = 49,006,423.72
  5. Step 5: Solve for x
    x = 49,006,423.72/7,983.77
  6. Step 6: Final answer
    x = 6,138.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.