Home / 20,969.73-31,469.16-13,555.80

Finding the Fourth Proportional to 20,969.73, 31,469.16 and 13,555.80

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Solution

The fourth proportional to 20,969.73, 31,469.16 and 13,555.80 is: 20,343.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.73 : 31,469.16 = 13,555.80 : x
  2. Step 2: Convert to fraction form
    20,969.73/31,469.16 = 13,555.80/x
  3. Step 3: Cross multiply
    20,969.73x = 31,469.16 × 13,555.80
  4. Step 4: Simplify right side
    20,969.73x = 426,589,639.13
  5. Step 5: Solve for x
    x = 426,589,639.13/20,969.73
  6. Step 6: Final answer
    x = 20,343.12

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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.