Home / 7,840.20-11,747.70-4,137.60

Finding the Fourth Proportional to 7,840.20, 11,747.70 and 4,137.60

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Solution

The fourth proportional to 7,840.20, 11,747.70 and 4,137.60 is: 6,199.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,840.20 : 11,747.70 = 4,137.60 : x
  2. Step 2: Convert to fraction form
    7,840.20/11,747.70 = 4,137.60/x
  3. Step 3: Cross multiply
    7,840.20x = 11,747.70 × 4,137.60
  4. Step 4: Simplify right side
    7,840.20x = 48,607,283.52
  5. Step 5: Solve for x
    x = 48,607,283.52/7,840.20
  6. Step 6: Final answer
    x = 6,199.75

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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.