Home / 20,438.88-30,642.03-18,798.72

Finding the Fourth Proportional to 20,438.88, 30,642.03 and 18,798.72

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Solution

The fourth proportional to 20,438.88, 30,642.03 and 18,798.72 is: 28,183.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.88 : 30,642.03 = 18,798.72 : x
  2. Step 2: Convert to fraction form
    20,438.88/30,642.03 = 18,798.72/x
  3. Step 3: Cross multiply
    20,438.88x = 30,642.03 × 18,798.72
  4. Step 4: Simplify right side
    20,438.88x = 576,030,942.20
  5. Step 5: Solve for x
    x = 576,030,942.20/20,438.88
  6. Step 6: Final answer
    x = 28,183.10

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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.