Home / 7,131.22-9,840.90-4,147.60

Finding the Fourth Proportional to 7,131.22, 9,840.90 and 4,147.60

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Solution

The fourth proportional to 7,131.22, 9,840.90 and 4,147.60 is: 5,723.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131.22 : 9,840.90 = 4,147.60 : x
  2. Step 2: Convert to fraction form
    7,131.22/9,840.90 = 4,147.60/x
  3. Step 3: Cross multiply
    7,131.22x = 9,840.90 × 4,147.60
  4. Step 4: Simplify right side
    7,131.22x = 40,816,116.84
  5. Step 5: Solve for x
    x = 40,816,116.84/7,131.22
  6. Step 6: Final answer
    x = 5,723.58

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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.