Home / 20,611.82-30,915.21-8,770.35

Finding the Fourth Proportional to 20,611.82, 30,915.21 and 8,770.35

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Solution

The fourth proportional to 20,611.82, 30,915.21 and 8,770.35 is: 13,154.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,611.82 : 30,915.21 = 8,770.35 : x
  2. Step 2: Convert to fraction form
    20,611.82/30,915.21 = 8,770.35/x
  3. Step 3: Cross multiply
    20,611.82x = 30,915.21 × 8,770.35
  4. Step 4: Simplify right side
    20,611.82x = 271,137,360.84
  5. Step 5: Solve for x
    x = 271,137,360.84/20,611.82
  6. Step 6: Final answer
    x = 13,154.46

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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.