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Finding the Fourth Proportional to 30,853.70, 46,163.55 and 20,485.70

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Solution

The fourth proportional to 30,853.70, 46,163.55 and 20,485.70 is: 30,650.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,853.70 : 46,163.55 = 20,485.70 : x
  2. Step 2: Convert to fraction form
    30,853.70/46,163.55 = 20,485.70/x
  3. Step 3: Cross multiply
    30,853.70x = 46,163.55 × 20,485.70
  4. Step 4: Simplify right side
    30,853.70x = 945,692,636.24
  5. Step 5: Solve for x
    x = 945,692,636.24/30,853.70
  6. Step 6: Final answer
    x = 30,650.87

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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.