Home / 20,119.72-30,179.58-7,639.75

Finding the Fourth Proportional to 20,119.72, 30,179.58 and 7,639.75

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Solution

The fourth proportional to 20,119.72, 30,179.58 and 7,639.75 is: 11,459.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,119.72 : 30,179.58 = 7,639.75 : x
  2. Step 2: Convert to fraction form
    20,119.72/30,179.58 = 7,639.75/x
  3. Step 3: Cross multiply
    20,119.72x = 30,179.58 × 7,639.75
  4. Step 4: Simplify right side
    20,119.72x = 230,564,370.86
  5. Step 5: Solve for x
    x = 230,564,370.86/20,119.72
  6. Step 6: Final answer
    x = 11,459.62

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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.