Home / 3,423.12-5,131.44-1,113.12

Finding the Fourth Proportional to 3,423.12, 5,131.44 and 1,113.12

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Solution

The fourth proportional to 3,423.12, 5,131.44 and 1,113.12 is: 1,668.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,423.12 : 5,131.44 = 1,113.12 : x
  2. Step 2: Convert to fraction form
    3,423.12/5,131.44 = 1,113.12/x
  3. Step 3: Cross multiply
    3,423.12x = 5,131.44 × 1,113.12
  4. Step 4: Simplify right side
    3,423.12x = 5,711,908.49
  5. Step 5: Solve for x
    x = 5,711,908.49/3,423.12
  6. Step 6: Final answer
    x = 1,668.63

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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.