Home / 5,165.87-7,128.81-2,808.02

Finding the Fourth Proportional to 5,165.87, 7,128.81 and 2,808.02

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Solution

The fourth proportional to 5,165.87, 7,128.81 and 2,808.02 is: 3,875.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,165.87 : 7,128.81 = 2,808.02 : x
  2. Step 2: Convert to fraction form
    5,165.87/7,128.81 = 2,808.02/x
  3. Step 3: Cross multiply
    5,165.87x = 7,128.81 × 2,808.02
  4. Step 4: Simplify right side
    5,165.87x = 20,017,841.06
  5. Step 5: Solve for x
    x = 20,017,841.06/5,165.87
  6. Step 6: Final answer
    x = 3,875.02

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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.