Home / 5,165.43-7,128.28-2,807.57

Finding the Fourth Proportional to 5,165.43, 7,128.28 and 2,807.57

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Solution

The fourth proportional to 5,165.43, 7,128.28 and 2,807.57 is: 3,874.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,165.43 : 7,128.28 = 2,807.57 : x
  2. Step 2: Convert to fraction form
    5,165.43/7,128.28 = 2,807.57/x
  3. Step 3: Cross multiply
    5,165.43x = 7,128.28 × 2,807.57
  4. Step 4: Simplify right side
    5,165.43x = 20,013,145.08
  5. Step 5: Solve for x
    x = 20,013,145.08/5,165.43
  6. Step 6: Final answer
    x = 3,874.44

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1.5x scale

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.