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Finding the Fourth Proportional to 20,706.20, 31,059.30 and 19,734.20

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Solution

The fourth proportional to 20,706.20, 31,059.30 and 19,734.20 is: 29,601.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,706.20 : 31,059.30 = 19,734.20 : x
  2. Step 2: Convert to fraction form
    20,706.20/31,059.30 = 19,734.20/x
  3. Step 3: Cross multiply
    20,706.20x = 31,059.30 × 19,734.20
  4. Step 4: Simplify right side
    20,706.20x = 612,930,438.06
  5. Step 5: Solve for x
    x = 612,930,438.06/20,706.20
  6. Step 6: Final answer
    x = 29,601.30

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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.