Home / 5,137.12-7,089.47-3,147.78

Finding the Fourth Proportional to 5,137.12, 7,089.47 and 3,147.78

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Solution

The fourth proportional to 5,137.12, 7,089.47 and 3,147.78 is: 4,344.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,137.12 : 7,089.47 = 3,147.78 : x
  2. Step 2: Convert to fraction form
    5,137.12/7,089.47 = 3,147.78/x
  3. Step 3: Cross multiply
    5,137.12x = 7,089.47 × 3,147.78
  4. Step 4: Simplify right side
    5,137.12x = 22,316,099.75
  5. Step 5: Solve for x
    x = 22,316,099.75/5,137.12
  6. Step 6: Final answer
    x = 4,344.09

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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.