Home / 7,939.74-11,909.64-3,319.50

Finding the Fourth Proportional to 7,939.74, 11,909.64 and 3,319.50

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Solution

The fourth proportional to 7,939.74, 11,909.64 and 3,319.50 is: 4,979.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,939.74 : 11,909.64 = 3,319.50 : x
  2. Step 2: Convert to fraction form
    7,939.74/11,909.64 = 3,319.50/x
  3. Step 3: Cross multiply
    7,939.74x = 11,909.64 × 3,319.50
  4. Step 4: Simplify right side
    7,939.74x = 39,534,049.98
  5. Step 5: Solve for x
    x = 39,534,049.98/7,939.74
  6. Step 6: Final answer
    x = 4,979.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.