Home / 12,134.80-18,209.40-7,986.70

Finding the Fourth Proportional to 12,134.80, 18,209.40 and 7,986.70

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Solution

The fourth proportional to 12,134.80, 18,209.40 and 7,986.70 is: 11,984.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,134.80 : 18,209.40 = 7,986.70 : x
  2. Step 2: Convert to fraction form
    12,134.80/18,209.40 = 7,986.70/x
  3. Step 3: Cross multiply
    12,134.80x = 18,209.40 × 7,986.70
  4. Step 4: Simplify right side
    12,134.80x = 145,433,014.98
  5. Step 5: Solve for x
    x = 145,433,014.98/12,134.80
  6. Step 6: Final answer
    x = 11,984.79

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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.