Home / 20,940.18-31,420.59-9,847.86

Finding the Fourth Proportional to 20,940.18, 31,420.59 and 9,847.86

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Solution

The fourth proportional to 20,940.18, 31,420.59 and 9,847.86 is: 14,776.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.18 : 31,420.59 = 9,847.86 : x
  2. Step 2: Convert to fraction form
    20,940.18/31,420.59 = 9,847.86/x
  3. Step 3: Cross multiply
    20,940.18x = 31,420.59 × 9,847.86
  4. Step 4: Simplify right side
    20,940.18x = 309,425,571.44
  5. Step 5: Solve for x
    x = 309,425,571.44/20,940.18
  6. Step 6: Final answer
    x = 14,776.64

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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.