Home / 12,115.44-16,720.92-8,980.56

Finding the Fourth Proportional to 12,115.44, 16,720.92 and 8,980.56

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Solution

The fourth proportional to 12,115.44, 16,720.92 and 8,980.56 is: 12,394.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,115.44 : 16,720.92 = 8,980.56 : x
  2. Step 2: Convert to fraction form
    12,115.44/16,720.92 = 8,980.56/x
  3. Step 3: Cross multiply
    12,115.44x = 16,720.92 × 8,980.56
  4. Step 4: Simplify right side
    12,115.44x = 150,163,225.32
  5. Step 5: Solve for x
    x = 150,163,225.32/12,115.44
  6. Step 6: Final answer
    x = 12,394.37

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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.