Home / 3,929.49-5,421.99-2,884.05

Finding the Fourth Proportional to 3,929.49, 5,421.99 and 2,884.05

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Solution

The fourth proportional to 3,929.49, 5,421.99 and 2,884.05 is: 3,979.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.49 : 5,421.99 = 2,884.05 : x
  2. Step 2: Convert to fraction form
    3,929.49/5,421.99 = 2,884.05/x
  3. Step 3: Cross multiply
    3,929.49x = 5,421.99 × 2,884.05
  4. Step 4: Simplify right side
    3,929.49x = 15,637,290.26
  5. Step 5: Solve for x
    x = 15,637,290.26/3,929.49
  6. Step 6: Final answer
    x = 3,979.47

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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.