Home / 3,878.68-5,349.04-2,886.44

Finding the Fourth Proportional to 3,878.68, 5,349.04 and 2,886.44

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Solution

The fourth proportional to 3,878.68, 5,349.04 and 2,886.44 is: 3,980.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.68 : 5,349.04 = 2,886.44 : x
  2. Step 2: Convert to fraction form
    3,878.68/5,349.04 = 2,886.44/x
  3. Step 3: Cross multiply
    3,878.68x = 5,349.04 × 2,886.44
  4. Step 4: Simplify right side
    3,878.68x = 15,439,683.02
  5. Step 5: Solve for x
    x = 15,439,683.02/3,878.68
  6. Step 6: Final answer
    x = 3,980.65

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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.