Home / 5,165.77-7,128.78-2,807.91

Finding the Fourth Proportional to 5,165.77, 7,128.78 and 2,807.91

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Solution

The fourth proportional to 5,165.77, 7,128.78 and 2,807.91 is: 3,874.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,165.77 : 7,128.78 = 2,807.91 : x
  2. Step 2: Convert to fraction form
    5,165.77/7,128.78 = 2,807.91/x
  3. Step 3: Cross multiply
    5,165.77x = 7,128.78 × 2,807.91
  4. Step 4: Simplify right side
    5,165.77x = 20,016,972.65
  5. Step 5: Solve for x
    x = 20,016,972.65/5,165.77
  6. Step 6: Final answer
    x = 3,874.93

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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.