Home / 5,429-8,143.50-1,325

Finding the Fourth Proportional to 5,429, 8,143.50 and 1,325

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Solution

The fourth proportional to 5,429, 8,143.50 and 1,325 is: 1,987.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,429 : 8,143.50 = 1,325 : x
  2. Step 2: Convert to fraction form
    5,429/8,143.50 = 1,325/x
  3. Step 3: Cross multiply
    5,429x = 8,143.50 × 1,325
  4. Step 4: Simplify right side
    5,429x = 10,790,137.50
  5. Step 5: Solve for x
    x = 10,790,137.50/5,429
  6. Step 6: Final answer
    x = 1,987.50

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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.