Home / 12,655.44-18,986.40-3,890.43

Finding the Fourth Proportional to 12,655.44, 18,986.40 and 3,890.43

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Solution

The fourth proportional to 12,655.44, 18,986.40 and 3,890.43 is: 5,836.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,655.44 : 18,986.40 = 3,890.43 : x
  2. Step 2: Convert to fraction form
    12,655.44/18,986.40 = 3,890.43/x
  3. Step 3: Cross multiply
    12,655.44x = 18,986.40 × 3,890.43
  4. Step 4: Simplify right side
    12,655.44x = 73,865,260.15
  5. Step 5: Solve for x
    x = 73,865,260.15/12,655.44
  6. Step 6: Final answer
    x = 5,836.64

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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.