Home / 20,907.08-31,353.66-8,423.88

Finding the Fourth Proportional to 20,907.08, 31,353.66 and 8,423.88

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Solution

The fourth proportional to 20,907.08, 31,353.66 and 8,423.88 is: 12,633.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907.08 : 31,353.66 = 8,423.88 : x
  2. Step 2: Convert to fraction form
    20,907.08/31,353.66 = 8,423.88/x
  3. Step 3: Cross multiply
    20,907.08x = 31,353.66 × 8,423.88
  4. Step 4: Simplify right side
    20,907.08x = 264,119,469.40
  5. Step 5: Solve for x
    x = 264,119,469.40/20,907.08
  6. Step 6: Final answer
    x = 12,633.02

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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.