Home / 30,439.20-45,662.45-12,906.75

Finding the Fourth Proportional to 30,439.20, 45,662.45 and 12,906.75

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Solution

The fourth proportional to 30,439.20, 45,662.45 and 12,906.75 is: 19,361.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,439.20 : 45,662.45 = 12,906.75 : x
  2. Step 2: Convert to fraction form
    30,439.20/45,662.45 = 12,906.75/x
  3. Step 3: Cross multiply
    30,439.20x = 45,662.45 × 12,906.75
  4. Step 4: Simplify right side
    30,439.20x = 589,353,762.00
  5. Step 5: Solve for x
    x = 589,353,762.00/30,439.20
  6. Step 6: Final answer
    x = 19,361.67

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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.