Home / 2,181.21-3,008.70-1,296.38

Finding the Fourth Proportional to 2,181.21, 3,008.70 and 1,296.38

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Solution

The fourth proportional to 2,181.21, 3,008.70 and 1,296.38 is: 1,788.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.21 : 3,008.70 = 1,296.38 : x
  2. Step 2: Convert to fraction form
    2,181.21/3,008.70 = 1,296.38/x
  3. Step 3: Cross multiply
    2,181.21x = 3,008.70 × 1,296.38
  4. Step 4: Simplify right side
    2,181.21x = 3,900,403.46
  5. Step 5: Solve for x
    x = 3,900,403.46/2,181.21
  6. Step 6: Final answer
    x = 1,788.18

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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.