Home / 12,305.80-18,461.36-3,986.65

Finding the Fourth Proportional to 12,305.80, 18,461.36 and 3,986.65

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Solution

The fourth proportional to 12,305.80, 18,461.36 and 3,986.65 is: 5,980.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,305.80 : 18,461.36 = 3,986.65 : x
  2. Step 2: Convert to fraction form
    12,305.80/18,461.36 = 3,986.65/x
  3. Step 3: Cross multiply
    12,305.80x = 18,461.36 × 3,986.65
  4. Step 4: Simplify right side
    12,305.80x = 73,598,980.84
  5. Step 5: Solve for x
    x = 73,598,980.84/12,305.80
  6. Step 6: Final answer
    x = 5,980.84

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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.