Home / 8,979.72-12,388.44-5,575.08

Finding the Fourth Proportional to 8,979.72, 12,388.44 and 5,575.08

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Solution

The fourth proportional to 8,979.72, 12,388.44 and 5,575.08 is: 7,691.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.72 : 12,388.44 = 5,575.08 : x
  2. Step 2: Convert to fraction form
    8,979.72/12,388.44 = 5,575.08/x
  3. Step 3: Cross multiply
    8,979.72x = 12,388.44 × 5,575.08
  4. Step 4: Simplify right side
    8,979.72x = 69,066,544.08
  5. Step 5: Solve for x
    x = 69,066,544.08/8,979.72
  6. Step 6: Final answer
    x = 7,691.39

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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.