Home / 3,878.14-5,352.05-2,109.70

Finding the Fourth Proportional to 3,878.14, 5,352.05 and 2,109.70

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Solution

The fourth proportional to 3,878.14, 5,352.05 and 2,109.70 is: 2,911.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.14 : 5,352.05 = 2,109.70 : x
  2. Step 2: Convert to fraction form
    3,878.14/5,352.05 = 2,109.70/x
  3. Step 3: Cross multiply
    3,878.14x = 5,352.05 × 2,109.70
  4. Step 4: Simplify right side
    3,878.14x = 11,291,219.89
  5. Step 5: Solve for x
    x = 11,291,219.89/3,878.14
  6. Step 6: Final answer
    x = 2,911.50

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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.