Home / 2,912.07-4,019.54-1,981.11

Finding the Fourth Proportional to 2,912.07, 4,019.54 and 1,981.11

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Solution

The fourth proportional to 2,912.07, 4,019.54 and 1,981.11 is: 2,734.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,912.07 : 4,019.54 = 1,981.11 : x
  2. Step 2: Convert to fraction form
    2,912.07/4,019.54 = 1,981.11/x
  3. Step 3: Cross multiply
    2,912.07x = 4,019.54 × 1,981.11
  4. Step 4: Simplify right side
    2,912.07x = 7,963,140.98
  5. Step 5: Solve for x
    x = 7,963,140.98/2,912.07
  6. Step 6: Final answer
    x = 2,734.53

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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.