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Finding the Fourth Proportional to 10,803.20, 16,205.70 and 3,012

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Solution

The fourth proportional to 10,803.20, 16,205.70 and 3,012 is: 4,518.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,803.20 : 16,205.70 = 3,012 : x
  2. Step 2: Convert to fraction form
    10,803.20/16,205.70 = 3,012/x
  3. Step 3: Cross multiply
    10,803.20x = 16,205.70 × 3,012
  4. Step 4: Simplify right side
    10,803.20x = 48,811,568.40
  5. Step 5: Solve for x
    x = 48,811,568.40/10,803.20
  6. Step 6: Final answer
    x = 4,518.25

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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.