Home / 2,127.21-2,936.31-1,231.35

Finding the Fourth Proportional to 2,127.21, 2,936.31 and 1,231.35

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Solution

The fourth proportional to 2,127.21, 2,936.31 and 1,231.35 is: 1,699.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.21 : 2,936.31 = 1,231.35 : x
  2. Step 2: Convert to fraction form
    2,127.21/2,936.31 = 1,231.35/x
  3. Step 3: Cross multiply
    2,127.21x = 2,936.31 × 1,231.35
  4. Step 4: Simplify right side
    2,127.21x = 3,615,625.32
  5. Step 5: Solve for x
    x = 3,615,625.32/2,127.21
  6. Step 6: Final answer
    x = 1,699.71

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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.