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Finding the Fourth Proportional to 30,611.46, 45,917.16 and 8,427.18

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Solution

The fourth proportional to 30,611.46, 45,917.16 and 8,427.18 is: 12,640.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,611.46 : 45,917.16 = 8,427.18 : x
  2. Step 2: Convert to fraction form
    30,611.46/45,917.16 = 8,427.18/x
  3. Step 3: Cross multiply
    30,611.46x = 45,917.16 × 8,427.18
  4. Step 4: Simplify right side
    30,611.46x = 386,952,172.41
  5. Step 5: Solve for x
    x = 386,952,172.41/30,611.46
  6. Step 6: Final answer
    x = 12,640.76

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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.