Home / 13,739.89-18,958.88-8,079.49

Finding the Fourth Proportional to 13,739.89, 18,958.88 and 8,079.49

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Solution

The fourth proportional to 13,739.89, 18,958.88 and 8,079.49 is: 11,148.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,739.89 : 18,958.88 = 8,079.49 : x
  2. Step 2: Convert to fraction form
    13,739.89/18,958.88 = 8,079.49/x
  3. Step 3: Cross multiply
    13,739.89x = 18,958.88 × 8,079.49
  4. Step 4: Simplify right side
    13,739.89x = 153,178,081.37
  5. Step 5: Solve for x
    x = 153,178,081.37/13,739.89
  6. Step 6: Final answer
    x = 11,148.42

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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.