Home / 2,265.21-3,128.10-2,142.48

Finding the Fourth Proportional to 2,265.21, 3,128.10 and 2,142.48

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Solution

The fourth proportional to 2,265.21, 3,128.10 and 2,142.48 is: 2,958.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,265.21 : 3,128.10 = 2,142.48 : x
  2. Step 2: Convert to fraction form
    2,265.21/3,128.10 = 2,142.48/x
  3. Step 3: Cross multiply
    2,265.21x = 3,128.10 × 2,142.48
  4. Step 4: Simplify right side
    2,265.21x = 6,701,891.69
  5. Step 5: Solve for x
    x = 6,701,891.69/2,265.21
  6. Step 6: Final answer
    x = 2,958.62

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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.