Home / 3,412.70-5,131.20-2,878.10

Finding the Fourth Proportional to 3,412.70, 5,131.20 and 2,878.10

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Solution

The fourth proportional to 3,412.70, 5,131.20 and 2,878.10 is: 4,327.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,412.70 : 5,131.20 = 2,878.10 : x
  2. Step 2: Convert to fraction form
    3,412.70/5,131.20 = 2,878.10/x
  3. Step 3: Cross multiply
    3,412.70x = 5,131.20 × 2,878.10
  4. Step 4: Simplify right side
    3,412.70x = 14,768,106.72
  5. Step 5: Solve for x
    x = 14,768,106.72/3,412.70
  6. Step 6: Final answer
    x = 4,327.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.