Home / 15,418.80-21,292.20-12,297.60

Finding the Fourth Proportional to 15,418.80, 21,292.20 and 12,297.60

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Solution

The fourth proportional to 15,418.80, 21,292.20 and 12,297.60 is: 16,982.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,418.80 : 21,292.20 = 12,297.60 : x
  2. Step 2: Convert to fraction form
    15,418.80/21,292.20 = 12,297.60/x
  3. Step 3: Cross multiply
    15,418.80x = 21,292.20 × 12,297.60
  4. Step 4: Simplify right side
    15,418.80x = 261,842,958.72
  5. Step 5: Solve for x
    x = 261,842,958.72/15,418.80
  6. Step 6: Final answer
    x = 16,982.06

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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.