Home / 5,428.90-8,143.35-2,505.61

Finding the Fourth Proportional to 5,428.90, 8,143.35 and 2,505.61

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Solution

The fourth proportional to 5,428.90, 8,143.35 and 2,505.61 is: 3,758.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.90 : 8,143.35 = 2,505.61 : x
  2. Step 2: Convert to fraction form
    5,428.90/8,143.35 = 2,505.61/x
  3. Step 3: Cross multiply
    5,428.90x = 8,143.35 × 2,505.61
  4. Step 4: Simplify right side
    5,428.90x = 20,404,059.19
  5. Step 5: Solve for x
    x = 20,404,059.19/5,428.90
  6. Step 6: Final answer
    x = 3,758.42

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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.