Home / 13,979.08-20,949.54-7,729.84

Finding the Fourth Proportional to 13,979.08, 20,949.54 and 7,729.84

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Solution

The fourth proportional to 13,979.08, 20,949.54 and 7,729.84 is: 11,584.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.08 : 20,949.54 = 7,729.84 : x
  2. Step 2: Convert to fraction form
    13,979.08/20,949.54 = 7,729.84/x
  3. Step 3: Cross multiply
    13,979.08x = 20,949.54 × 7,729.84
  4. Step 4: Simplify right side
    13,979.08x = 161,936,592.27
  5. Step 5: Solve for x
    x = 161,936,592.27/13,979.08
  6. Step 6: Final answer
    x = 11,584.21

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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.