Home / 3,678.68-5,076.79-2,085.45

Finding the Fourth Proportional to 3,678.68, 5,076.79 and 2,085.45

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Solution

The fourth proportional to 3,678.68, 5,076.79 and 2,085.45 is: 2,878.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.68 : 5,076.79 = 2,085.45 : x
  2. Step 2: Convert to fraction form
    3,678.68/5,076.79 = 2,085.45/x
  3. Step 3: Cross multiply
    3,678.68x = 5,076.79 × 2,085.45
  4. Step 4: Simplify right side
    3,678.68x = 10,587,386.49
  5. Step 5: Solve for x
    x = 10,587,386.49/3,678.68
  6. Step 6: Final answer
    x = 2,878.04

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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.