Home / 2,181.86-3,010.96-1,187.14

Finding the Fourth Proportional to 2,181.86, 3,010.96 and 1,187.14

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Solution

The fourth proportional to 2,181.86, 3,010.96 and 1,187.14 is: 1,638.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.86 : 3,010.96 = 1,187.14 : x
  2. Step 2: Convert to fraction form
    2,181.86/3,010.96 = 1,187.14/x
  3. Step 3: Cross multiply
    2,181.86x = 3,010.96 × 1,187.14
  4. Step 4: Simplify right side
    2,181.86x = 3,574,425.12
  5. Step 5: Solve for x
    x = 3,574,425.12/2,181.86
  6. Step 6: Final answer
    x = 1,638.25

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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.