Home / 2,172.28-3,242.69-2,020.36

Finding the Fourth Proportional to 2,172.28, 3,242.69 and 2,020.36

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Solution

The fourth proportional to 2,172.28, 3,242.69 and 2,020.36 is: 3,015.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.28 : 3,242.69 = 2,020.36 : x
  2. Step 2: Convert to fraction form
    2,172.28/3,242.69 = 2,020.36/x
  3. Step 3: Cross multiply
    2,172.28x = 3,242.69 × 2,020.36
  4. Step 4: Simplify right side
    2,172.28x = 6,551,401.17
  5. Step 5: Solve for x
    x = 6,551,401.17/2,172.28
  6. Step 6: Final answer
    x = 3,015.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.