Home / 20,172.20-30,258.30-15,506.60

Finding the Fourth Proportional to 20,172.20, 30,258.30 and 15,506.60

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Solution

The fourth proportional to 20,172.20, 30,258.30 and 15,506.60 is: 23,259.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,172.20 : 30,258.30 = 15,506.60 : x
  2. Step 2: Convert to fraction form
    20,172.20/30,258.30 = 15,506.60/x
  3. Step 3: Cross multiply
    20,172.20x = 30,258.30 × 15,506.60
  4. Step 4: Simplify right side
    20,172.20x = 469,203,354.78
  5. Step 5: Solve for x
    x = 469,203,354.78/20,172.20
  6. Step 6: Final answer
    x = 23,259.90

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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.