Home / 20,190.71-27,851.37-13,121.84

Finding the Fourth Proportional to 20,190.71, 27,851.37 and 13,121.84

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Solution

The fourth proportional to 20,190.71, 27,851.37 and 13,121.84 is: 18,100.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190.71 : 27,851.37 = 13,121.84 : x
  2. Step 2: Convert to fraction form
    20,190.71/27,851.37 = 13,121.84/x
  3. Step 3: Cross multiply
    20,190.71x = 27,851.37 × 13,121.84
  4. Step 4: Simplify right side
    20,190.71x = 365,461,220.92
  5. Step 5: Solve for x
    x = 365,461,220.92/20,190.71
  6. Step 6: Final answer
    x = 18,100.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.