Home / 5,165.15-7,127.91-2,807.28

Finding the Fourth Proportional to 5,165.15, 7,127.91 and 2,807.28

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Solution

The fourth proportional to 5,165.15, 7,127.91 and 2,807.28 is: 3,874.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,165.15 : 7,127.91 = 2,807.28 : x
  2. Step 2: Convert to fraction form
    5,165.15/7,127.91 = 2,807.28/x
  3. Step 3: Cross multiply
    5,165.15x = 7,127.91 × 2,807.28
  4. Step 4: Simplify right side
    5,165.15x = 20,010,039.18
  5. Step 5: Solve for x
    x = 20,010,039.18/5,165.15
  6. Step 6: Final answer
    x = 3,874.05

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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.