Home / 20,131.79-30,208.55-11,828.03

Finding the Fourth Proportional to 20,131.79, 30,208.55 and 11,828.03

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Solution

The fourth proportional to 20,131.79, 30,208.55 and 11,828.03 is: 17,748.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.79 : 30,208.55 = 11,828.03 : x
  2. Step 2: Convert to fraction form
    20,131.79/30,208.55 = 11,828.03/x
  3. Step 3: Cross multiply
    20,131.79x = 30,208.55 × 11,828.03
  4. Step 4: Simplify right side
    20,131.79x = 357,307,425.47
  5. Step 5: Solve for x
    x = 357,307,425.47/20,131.79
  6. Step 6: Final answer
    x = 17,748.42

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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.