Home / 15,928.82-21,979.18-8,855.06

Finding the Fourth Proportional to 15,928.82, 21,979.18 and 8,855.06

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Solution

The fourth proportional to 15,928.82, 21,979.18 and 8,855.06 is: 12,218.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,928.82 : 21,979.18 = 8,855.06 : x
  2. Step 2: Convert to fraction form
    15,928.82/21,979.18 = 8,855.06/x
  3. Step 3: Cross multiply
    15,928.82x = 21,979.18 × 8,855.06
  4. Step 4: Simplify right side
    15,928.82x = 194,626,825.62
  5. Step 5: Solve for x
    x = 194,626,825.62/15,928.82
  6. Step 6: Final answer
    x = 12,218.54

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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.