Home / 18,991.23-26,190.86-15,815.03

Finding the Fourth Proportional to 18,991.23, 26,190.86 and 15,815.03

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Solution

The fourth proportional to 18,991.23, 26,190.86 and 15,815.03 is: 21,810.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.23 : 26,190.86 = 15,815.03 : x
  2. Step 2: Convert to fraction form
    18,991.23/26,190.86 = 15,815.03/x
  3. Step 3: Cross multiply
    18,991.23x = 26,190.86 × 15,815.03
  4. Step 4: Simplify right side
    18,991.23x = 414,209,262.88
  5. Step 5: Solve for x
    x = 414,209,262.88/18,991.23
  6. Step 6: Final answer
    x = 21,810.56

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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.