Home / 12,220.53-18,330.77-2,986.53

Finding the Fourth Proportional to 12,220.53, 18,330.77 and 2,986.53

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Solution

The fourth proportional to 12,220.53, 18,330.77 and 2,986.53 is: 4,479.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.53 : 18,330.77 = 2,986.53 : x
  2. Step 2: Convert to fraction form
    12,220.53/18,330.77 = 2,986.53/x
  3. Step 3: Cross multiply
    12,220.53x = 18,330.77 × 2,986.53
  4. Step 4: Simplify right side
    12,220.53x = 54,745,379.60
  5. Step 5: Solve for x
    x = 54,745,379.60/12,220.53
  6. Step 6: Final answer
    x = 4,479.79

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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.