Home / 15,485.84-21,365.88-9,198.80

Finding the Fourth Proportional to 15,485.84, 21,365.88 and 9,198.80

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Solution

The fourth proportional to 15,485.84, 21,365.88 and 9,198.80 is: 12,691.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.84 : 21,365.88 = 9,198.80 : x
  2. Step 2: Convert to fraction form
    15,485.84/21,365.88 = 9,198.80/x
  3. Step 3: Cross multiply
    15,485.84x = 21,365.88 × 9,198.80
  4. Step 4: Simplify right side
    15,485.84x = 196,540,456.94
  5. Step 5: Solve for x
    x = 196,540,456.94/15,485.84
  6. Step 6: Final answer
    x = 12,691.62

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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.