Home / 20,101.20-30,142.20-9,007.98

Finding the Fourth Proportional to 20,101.20, 30,142.20 and 9,007.98

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Solution

The fourth proportional to 20,101.20, 30,142.20 and 9,007.98 is: 13,507.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,101.20 : 30,142.20 = 9,007.98 : x
  2. Step 2: Convert to fraction form
    20,101.20/30,142.20 = 9,007.98/x
  3. Step 3: Cross multiply
    20,101.20x = 30,142.20 × 9,007.98
  4. Step 4: Simplify right side
    20,101.20x = 271,520,334.76
  5. Step 5: Solve for x
    x = 271,520,334.76/20,101.20
  6. Step 6: Final answer
    x = 13,507.67

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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.