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Finding the Fourth Proportional to 7,130.99, 9,840.69 and 3,944.43

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Solution

The fourth proportional to 7,130.99, 9,840.69 and 3,944.43 is: 5,443.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,130.99 : 9,840.69 = 3,944.43 : x
  2. Step 2: Convert to fraction form
    7,130.99/9,840.69 = 3,944.43/x
  3. Step 3: Cross multiply
    7,130.99x = 9,840.69 × 3,944.43
  4. Step 4: Simplify right side
    7,130.99x = 38,815,912.86
  5. Step 5: Solve for x
    x = 38,815,912.86/7,130.99
  6. Step 6: Final answer
    x = 5,443.27

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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.