Home / 5,165.55-7,128.25-2,807.64

Finding the Fourth Proportional to 5,165.55, 7,128.25 and 2,807.64

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Solution

The fourth proportional to 5,165.55, 7,128.25 and 2,807.64 is: 3,874.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,165.55 : 7,128.25 = 2,807.64 : x
  2. Step 2: Convert to fraction form
    5,165.55/7,128.25 = 2,807.64/x
  3. Step 3: Cross multiply
    5,165.55x = 7,128.25 × 2,807.64
  4. Step 4: Simplify right side
    5,165.55x = 20,013,552.81
  5. Step 5: Solve for x
    x = 20,013,552.81/5,165.55
  6. Step 6: Final answer
    x = 3,874.43

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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.