Home / 3,886.39-5,368.35-2,880.15

Finding the Fourth Proportional to 3,886.39, 5,368.35 and 2,880.15

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Solution

The fourth proportional to 3,886.39, 5,368.35 and 2,880.15 is: 3,978.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,886.39 : 5,368.35 = 2,880.15 : x
  2. Step 2: Convert to fraction form
    3,886.39/5,368.35 = 2,880.15/x
  3. Step 3: Cross multiply
    3,886.39x = 5,368.35 × 2,880.15
  4. Step 4: Simplify right side
    3,886.39x = 15,461,653.25
  5. Step 5: Solve for x
    x = 15,461,653.25/3,886.39
  6. Step 6: Final answer
    x = 3,978.41

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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.