Home / 12,313.49-18,466.31-3,991.55

Finding the Fourth Proportional to 12,313.49, 18,466.31 and 3,991.55

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Solution

The fourth proportional to 12,313.49, 18,466.31 and 3,991.55 is: 5,986.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,313.49 : 18,466.31 = 3,991.55 : x
  2. Step 2: Convert to fraction form
    12,313.49/18,466.31 = 3,991.55/x
  3. Step 3: Cross multiply
    12,313.49x = 18,466.31 × 3,991.55
  4. Step 4: Simplify right side
    12,313.49x = 73,709,117.33
  5. Step 5: Solve for x
    x = 73,709,117.33/12,313.49
  6. Step 6: Final answer
    x = 5,986.05

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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.