Home / 2,127.65-2,936.23-1,288.51

Finding the Fourth Proportional to 2,127.65, 2,936.23 and 1,288.51

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Solution

The fourth proportional to 2,127.65, 2,936.23 and 1,288.51 is: 1,778.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.65 : 2,936.23 = 1,288.51 : x
  2. Step 2: Convert to fraction form
    2,127.65/2,936.23 = 1,288.51/x
  3. Step 3: Cross multiply
    2,127.65x = 2,936.23 × 1,288.51
  4. Step 4: Simplify right side
    2,127.65x = 3,783,361.72
  5. Step 5: Solve for x
    x = 3,783,361.72/2,127.65
  6. Step 6: Final answer
    x = 1,778.19

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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.