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Finding the Fourth Proportional to 7,131.28, 9,840.76 and 3,944.39

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Solution

The fourth proportional to 7,131.28, 9,840.76 and 3,944.39 is: 5,443.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131.28 : 9,840.76 = 3,944.39 : x
  2. Step 2: Convert to fraction form
    7,131.28/9,840.76 = 3,944.39/x
  3. Step 3: Cross multiply
    7,131.28x = 9,840.76 × 3,944.39
  4. Step 4: Simplify right side
    7,131.28x = 38,815,795.34
  5. Step 5: Solve for x
    x = 38,815,795.34/7,131.28
  6. Step 6: Final answer
    x = 5,443.03

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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.