Home / 20,104.20-30,156.30-15,438.60

Finding the Fourth Proportional to 20,104.20, 30,156.30 and 15,438.60

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Solution

The fourth proportional to 20,104.20, 30,156.30 and 15,438.60 is: 23,157.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,104.20 : 30,156.30 = 15,438.60 : x
  2. Step 2: Convert to fraction form
    20,104.20/30,156.30 = 15,438.60/x
  3. Step 3: Cross multiply
    20,104.20x = 30,156.30 × 15,438.60
  4. Step 4: Simplify right side
    20,104.20x = 465,571,053.18
  5. Step 5: Solve for x
    x = 465,571,053.18/20,104.20
  6. Step 6: Final answer
    x = 23,157.90

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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.