Home / 7,121.55-9,827.55-4,137.30

Finding the Fourth Proportional to 7,121.55, 9,827.55 and 4,137.30

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Solution

The fourth proportional to 7,121.55, 9,827.55 and 4,137.30 is: 5,709.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.55 : 9,827.55 = 4,137.30 : x
  2. Step 2: Convert to fraction form
    7,121.55/9,827.55 = 4,137.30/x
  3. Step 3: Cross multiply
    7,121.55x = 9,827.55 × 4,137.30
  4. Step 4: Simplify right side
    7,121.55x = 40,659,522.62
  5. Step 5: Solve for x
    x = 40,659,522.62/7,121.55
  6. Step 6: Final answer
    x = 5,709.36

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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.