Home / 13,739.09-18,958.66-7,771.28

Finding the Fourth Proportional to 13,739.09, 18,958.66 and 7,771.28

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Solution

The fourth proportional to 13,739.09, 18,958.66 and 7,771.28 is: 10,723.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,739.09 : 18,958.66 = 7,771.28 : x
  2. Step 2: Convert to fraction form
    13,739.09/18,958.66 = 7,771.28/x
  3. Step 3: Cross multiply
    13,739.09x = 18,958.66 × 7,771.28
  4. Step 4: Simplify right side
    13,739.09x = 147,332,941.06
  5. Step 5: Solve for x
    x = 147,332,941.06/13,739.09
  6. Step 6: Final answer
    x = 10,723.64

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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.