Home / 12,313.40-18,467.70-3,991.40

Finding the Fourth Proportional to 12,313.40, 18,467.70 and 3,991.40

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Solution

The fourth proportional to 12,313.40, 18,467.70 and 3,991.40 is: 5,986.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,313.40 : 18,467.70 = 3,991.40 : x
  2. Step 2: Convert to fraction form
    12,313.40/18,467.70 = 3,991.40/x
  3. Step 3: Cross multiply
    12,313.40x = 18,467.70 × 3,991.40
  4. Step 4: Simplify right side
    12,313.40x = 73,711,977.78
  5. Step 5: Solve for x
    x = 73,711,977.78/12,313.40
  6. Step 6: Final answer
    x = 5,986.32

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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.