Home / 3,161.80-4,742.70-3,113.20

Finding the Fourth Proportional to 3,161.80, 4,742.70 and 3,113.20

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Solution

The fourth proportional to 3,161.80, 4,742.70 and 3,113.20 is: 4,669.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,161.80 : 4,742.70 = 3,113.20 : x
  2. Step 2: Convert to fraction form
    3,161.80/4,742.70 = 3,113.20/x
  3. Step 3: Cross multiply
    3,161.80x = 4,742.70 × 3,113.20
  4. Step 4: Simplify right side
    3,161.80x = 14,764,973.64
  5. Step 5: Solve for x
    x = 14,764,973.64/3,161.80
  6. Step 6: Final answer
    x = 4,669.80

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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.