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Finding the Fourth Proportional to 14,000.40, 20,976.12 and 10,311.60

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Solution

The fourth proportional to 14,000.40, 20,976.12 and 10,311.60 is: 15,449.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,000.40 : 20,976.12 = 10,311.60 : x
  2. Step 2: Convert to fraction form
    14,000.40/20,976.12 = 10,311.60/x
  3. Step 3: Cross multiply
    14,000.40x = 20,976.12 × 10,311.60
  4. Step 4: Simplify right side
    14,000.40x = 216,297,358.99
  5. Step 5: Solve for x
    x = 216,297,358.99/14,000.40
  6. Step 6: Final answer
    x = 15,449.37

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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.