Home / 15,231.75-21,014.20-9,183.31

Finding the Fourth Proportional to 15,231.75, 21,014.20 and 9,183.31

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Solution

The fourth proportional to 15,231.75, 21,014.20 and 9,183.31 is: 12,669.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,231.75 : 21,014.20 = 9,183.31 : x
  2. Step 2: Convert to fraction form
    15,231.75/21,014.20 = 9,183.31/x
  3. Step 3: Cross multiply
    15,231.75x = 21,014.20 × 9,183.31
  4. Step 4: Simplify right side
    15,231.75x = 192,979,871.95
  5. Step 5: Solve for x
    x = 192,979,871.95/15,231.75
  6. Step 6: Final answer
    x = 12,669.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.