Home / 20,977.98-28,949.91-11,418.16

Finding the Fourth Proportional to 20,977.98, 28,949.91 and 11,418.16

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Solution

The fourth proportional to 20,977.98, 28,949.91 and 11,418.16 is: 15,757.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,977.98 : 28,949.91 = 11,418.16 : x
  2. Step 2: Convert to fraction form
    20,977.98/28,949.91 = 11,418.16/x
  3. Step 3: Cross multiply
    20,977.98x = 28,949.91 × 11,418.16
  4. Step 4: Simplify right side
    20,977.98x = 330,554,704.37
  5. Step 5: Solve for x
    x = 330,554,704.37/20,977.98
  6. Step 6: Final answer
    x = 15,757.22

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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.