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Finding the Fourth Proportional to 13,199.85, 19,838.50 and 10,992.80

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Solution

The fourth proportional to 13,199.85, 19,838.50 and 10,992.80 is: 16,521.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,199.85 : 19,838.50 = 10,992.80 : x
  2. Step 2: Convert to fraction form
    13,199.85/19,838.50 = 10,992.80/x
  3. Step 3: Cross multiply
    13,199.85x = 19,838.50 × 10,992.80
  4. Step 4: Simplify right side
    13,199.85x = 218,080,662.80
  5. Step 5: Solve for x
    x = 218,080,662.80/13,199.85
  6. Step 6: Final answer
    x = 16,521.45

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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.