Home / 2,112.40-3,172.20-1,500.40

Finding the Fourth Proportional to 2,112.40, 3,172.20 and 1,500.40

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Solution

The fourth proportional to 2,112.40, 3,172.20 and 1,500.40 is: 2,253.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,112.40 : 3,172.20 = 1,500.40 : x
  2. Step 2: Convert to fraction form
    2,112.40/3,172.20 = 1,500.40/x
  3. Step 3: Cross multiply
    2,112.40x = 3,172.20 × 1,500.40
  4. Step 4: Simplify right side
    2,112.40x = 4,759,568.88
  5. Step 5: Solve for x
    x = 4,759,568.88/2,112.40
  6. Step 6: Final answer
    x = 2,253.16

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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.