Home / 2,172.96-3,256.94-939.13

Finding the Fourth Proportional to 2,172.96, 3,256.94 and 939.13

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Solution

The fourth proportional to 2,172.96, 3,256.94 and 939.13 is: 1,407.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.96 : 3,256.94 = 939.13 : x
  2. Step 2: Convert to fraction form
    2,172.96/3,256.94 = 939.13/x
  3. Step 3: Cross multiply
    2,172.96x = 3,256.94 × 939.13
  4. Step 4: Simplify right side
    2,172.96x = 3,058,690.06
  5. Step 5: Solve for x
    x = 3,058,690.06/2,172.96
  6. Step 6: Final answer
    x = 1,407.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.