Home / 20,553.36-30,880.76-13,161.04

Finding the Fourth Proportional to 20,553.36, 30,880.76 and 13,161.04

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Solution

The fourth proportional to 20,553.36, 30,880.76 and 13,161.04 is: 19,774.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,553.36 : 30,880.76 = 13,161.04 : x
  2. Step 2: Convert to fraction form
    20,553.36/30,880.76 = 13,161.04/x
  3. Step 3: Cross multiply
    20,553.36x = 30,880.76 × 13,161.04
  4. Step 4: Simplify right side
    20,553.36x = 406,422,917.59
  5. Step 5: Solve for x
    x = 406,422,917.59/20,553.36
  6. Step 6: Final answer
    x = 19,774.04

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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.