Home / 3,880.18-5,354.78-2,111.85

Finding the Fourth Proportional to 3,880.18, 5,354.78 and 2,111.85

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Solution

The fourth proportional to 3,880.18, 5,354.78 and 2,111.85 is: 2,914.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,880.18 : 5,354.78 = 2,111.85 : x
  2. Step 2: Convert to fraction form
    3,880.18/5,354.78 = 2,111.85/x
  3. Step 3: Cross multiply
    3,880.18x = 5,354.78 × 2,111.85
  4. Step 4: Simplify right side
    3,880.18x = 11,308,492.14
  5. Step 5: Solve for x
    x = 11,308,492.14/3,880.18
  6. Step 6: Final answer
    x = 2,914.42

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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.