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Finding the Fourth Proportional to 30,611.40, 45,906.30 and 10,890.60

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Solution

The fourth proportional to 30,611.40, 45,906.30 and 10,890.60 is: 16,332.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,611.40 : 45,906.30 = 10,890.60 : x
  2. Step 2: Convert to fraction form
    30,611.40/45,906.30 = 10,890.60/x
  3. Step 3: Cross multiply
    30,611.40x = 45,906.30 × 10,890.60
  4. Step 4: Simplify right side
    30,611.40x = 499,947,150.78
  5. Step 5: Solve for x
    x = 499,947,150.78/30,611.40
  6. Step 6: Final answer
    x = 16,332.06

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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.