Home / 20,423.20-30,638.89-9,326.90

Finding the Fourth Proportional to 20,423.20, 30,638.89 and 9,326.90

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Solution

The fourth proportional to 20,423.20, 30,638.89 and 9,326.90 is: 13,992.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,423.20 : 30,638.89 = 9,326.90 : x
  2. Step 2: Convert to fraction form
    20,423.20/30,638.89 = 9,326.90/x
  3. Step 3: Cross multiply
    20,423.20x = 30,638.89 × 9,326.90
  4. Step 4: Simplify right side
    20,423.20x = 285,765,863.14
  5. Step 5: Solve for x
    x = 285,765,863.14/20,423.20
  6. Step 6: Final answer
    x = 13,992.22

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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.