Home / 2,128.05-3,186.14-1,933.20

Finding the Fourth Proportional to 2,128.05, 3,186.14 and 1,933.20

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Solution

The fourth proportional to 2,128.05, 3,186.14 and 1,933.20 is: 2,894.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.05 : 3,186.14 = 1,933.20 : x
  2. Step 2: Convert to fraction form
    2,128.05/3,186.14 = 1,933.20/x
  3. Step 3: Cross multiply
    2,128.05x = 3,186.14 × 1,933.20
  4. Step 4: Simplify right side
    2,128.05x = 6,159,436.18
  5. Step 5: Solve for x
    x = 6,159,436.18/2,128.05
  6. Step 6: Final answer
    x = 2,894.40

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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.