Home / 2,979.18-4,104.64-2,181.15

Finding the Fourth Proportional to 2,979.18, 4,104.64 and 2,181.15

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Solution

The fourth proportional to 2,979.18, 4,104.64 and 2,181.15 is: 3,005.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.18 : 4,104.64 = 2,181.15 : x
  2. Step 2: Convert to fraction form
    2,979.18/4,104.64 = 2,181.15/x
  3. Step 3: Cross multiply
    2,979.18x = 4,104.64 × 2,181.15
  4. Step 4: Simplify right side
    2,979.18x = 8,952,835.54
  5. Step 5: Solve for x
    x = 8,952,835.54/2,979.18
  6. Step 6: Final answer
    x = 3,005.13

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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.