Home / 20,969.62-31,469.01-13,555.69

Finding the Fourth Proportional to 20,969.62, 31,469.01 and 13,555.69

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Solution

The fourth proportional to 20,969.62, 31,469.01 and 13,555.69 is: 20,342.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.62 : 31,469.01 = 13,555.69 : x
  2. Step 2: Convert to fraction form
    20,969.62/31,469.01 = 13,555.69/x
  3. Step 3: Cross multiply
    20,969.62x = 31,469.01 × 13,555.69
  4. Step 4: Simplify right side
    20,969.62x = 426,584,014.66
  5. Step 5: Solve for x
    x = 426,584,014.66/20,969.62
  6. Step 6: Final answer
    x = 20,342.96

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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.