Home / 13,739.49-18,961.44-7,771.14

Finding the Fourth Proportional to 13,739.49, 18,961.44 and 7,771.14

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Solution

The fourth proportional to 13,739.49, 18,961.44 and 7,771.14 is: 10,724.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,739.49 : 18,961.44 = 7,771.14 : x
  2. Step 2: Convert to fraction form
    13,739.49/18,961.44 = 7,771.14/x
  3. Step 3: Cross multiply
    13,739.49x = 18,961.44 × 7,771.14
  4. Step 4: Simplify right side
    13,739.49x = 147,352,004.84
  5. Step 5: Solve for x
    x = 147,352,004.84/13,739.49
  6. Step 6: Final answer
    x = 10,724.71

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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.