Home / 5,165.14-7,127.64-2,807.20

Finding the Fourth Proportional to 5,165.14, 7,127.64 and 2,807.20

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Solution

The fourth proportional to 5,165.14, 7,127.64 and 2,807.20 is: 3,873.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,165.14 : 7,127.64 = 2,807.20 : x
  2. Step 2: Convert to fraction form
    5,165.14/7,127.64 = 2,807.20/x
  3. Step 3: Cross multiply
    5,165.14x = 7,127.64 × 2,807.20
  4. Step 4: Simplify right side
    5,165.14x = 20,008,711.01
  5. Step 5: Solve for x
    x = 20,008,711.01/5,165.14
  6. Step 6: Final answer
    x = 3,873.80

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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.