Home / 3,929.87-5,894.80-1,979.79

Finding the Fourth Proportional to 3,929.87, 5,894.80 and 1,979.79

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Solution

The fourth proportional to 3,929.87, 5,894.80 and 1,979.79 is: 2,969.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.87 : 5,894.80 = 1,979.79 : x
  2. Step 2: Convert to fraction form
    3,929.87/5,894.80 = 1,979.79/x
  3. Step 3: Cross multiply
    3,929.87x = 5,894.80 × 1,979.79
  4. Step 4: Simplify right side
    3,929.87x = 11,670,477.76
  5. Step 5: Solve for x
    x = 11,670,477.76/3,929.87
  6. Step 6: Final answer
    x = 2,969.69

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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.