Home / 12,181.30-18,270.60-9,986.20

Finding the Fourth Proportional to 12,181.30, 18,270.60 and 9,986.20

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Solution

The fourth proportional to 12,181.30, 18,270.60 and 9,986.20 is: 14,978.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,181.30 : 18,270.60 = 9,986.20 : x
  2. Step 2: Convert to fraction form
    12,181.30/18,270.60 = 9,986.20/x
  3. Step 3: Cross multiply
    12,181.30x = 18,270.60 × 9,986.20
  4. Step 4: Simplify right side
    12,181.30x = 182,453,865.72
  5. Step 5: Solve for x
    x = 182,453,865.72/12,181.30
  6. Step 6: Final answer
    x = 14,978.19

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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.