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Finding the Fourth Proportional to 7,125.80, 9,825.90 and 5,000.60

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Solution

The fourth proportional to 7,125.80, 9,825.90 and 5,000.60 is: 6,895.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,125.80 : 9,825.90 = 5,000.60 : x
  2. Step 2: Convert to fraction form
    7,125.80/9,825.90 = 5,000.60/x
  3. Step 3: Cross multiply
    7,125.80x = 9,825.90 × 5,000.60
  4. Step 4: Simplify right side
    7,125.80x = 49,135,395.54
  5. Step 5: Solve for x
    x = 49,135,395.54/7,125.80
  6. Step 6: Final answer
    x = 6,895.42

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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.