Home / 3,929.68-5,894.28-1,621.12

Finding the Fourth Proportional to 3,929.68, 5,894.28 and 1,621.12

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Solution

The fourth proportional to 3,929.68, 5,894.28 and 1,621.12 is: 2,431.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.68 : 5,894.28 = 1,621.12 : x
  2. Step 2: Convert to fraction form
    3,929.68/5,894.28 = 1,621.12/x
  3. Step 3: Cross multiply
    3,929.68x = 5,894.28 × 1,621.12
  4. Step 4: Simplify right side
    3,929.68x = 9,555,335.19
  5. Step 5: Solve for x
    x = 9,555,335.19/3,929.68
  6. Step 6: Final answer
    x = 2,431.58

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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.