Home / 3,420.30-5,126.69-3,143.51

Finding the Fourth Proportional to 3,420.30, 5,126.69 and 3,143.51

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Solution

The fourth proportional to 3,420.30, 5,126.69 and 3,143.51 is: 4,711.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.30 : 5,126.69 = 3,143.51 : x
  2. Step 2: Convert to fraction form
    3,420.30/5,126.69 = 3,143.51/x
  3. Step 3: Cross multiply
    3,420.30x = 5,126.69 × 3,143.51
  4. Step 4: Simplify right side
    3,420.30x = 16,115,801.28
  5. Step 5: Solve for x
    x = 16,115,801.28/3,420.30
  6. Step 6: Final answer
    x = 4,711.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.