Home / 2,127.74-2,936.87-1,288.31

Finding the Fourth Proportional to 2,127.74, 2,936.87 and 1,288.31

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Solution

The fourth proportional to 2,127.74, 2,936.87 and 1,288.31 is: 1,778.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.74 : 2,936.87 = 1,288.31 : x
  2. Step 2: Convert to fraction form
    2,127.74/2,936.87 = 1,288.31/x
  3. Step 3: Cross multiply
    2,127.74x = 2,936.87 × 1,288.31
  4. Step 4: Simplify right side
    2,127.74x = 3,783,577.86
  5. Step 5: Solve for x
    x = 3,783,577.86/2,127.74
  6. Step 6: Final answer
    x = 1,778.22

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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.