Home / 30,919.64-42,664.20-18,183.74

Finding the Fourth Proportional to 30,919.64, 42,664.20 and 18,183.74

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Solution

The fourth proportional to 30,919.64, 42,664.20 and 18,183.74 is: 25,090.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,919.64 : 42,664.20 = 18,183.74 : x
  2. Step 2: Convert to fraction form
    30,919.64/42,664.20 = 18,183.74/x
  3. Step 3: Cross multiply
    30,919.64x = 42,664.20 × 18,183.74
  4. Step 4: Simplify right side
    30,919.64x = 775,794,506.79
  5. Step 5: Solve for x
    x = 775,794,506.79/30,919.64
  6. Step 6: Final answer
    x = 25,090.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.