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Finding the Fourth Proportional to 10,990.76, 16,486.58 and 3,199.57

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Solution

The fourth proportional to 10,990.76, 16,486.58 and 3,199.57 is: 4,799.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,990.76 : 16,486.58 = 3,199.57 : x
  2. Step 2: Convert to fraction form
    10,990.76/16,486.58 = 3,199.57/x
  3. Step 3: Cross multiply
    10,990.76x = 16,486.58 × 3,199.57
  4. Step 4: Simplify right side
    10,990.76x = 52,749,933.55
  5. Step 5: Solve for x
    x = 52,749,933.55/10,990.76
  6. Step 6: Final answer
    x = 4,799.48

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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.