Home / 12,130.75-18,216.38-11,221.53

Finding the Fourth Proportional to 12,130.75, 18,216.38 and 11,221.53

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Solution

The fourth proportional to 12,130.75, 18,216.38 and 11,221.53 is: 16,851.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,130.75 : 18,216.38 = 11,221.53 : x
  2. Step 2: Convert to fraction form
    12,130.75/18,216.38 = 11,221.53/x
  3. Step 3: Cross multiply
    12,130.75x = 18,216.38 × 11,221.53
  4. Step 4: Simplify right side
    12,130.75x = 204,415,654.66
  5. Step 5: Solve for x
    x = 204,415,654.66/12,130.75
  6. Step 6: Final answer
    x = 16,851.03

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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.