Home / 20,896.56-31,303.44-12,578.76

Finding the Fourth Proportional to 20,896.56, 31,303.44 and 12,578.76

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Solution

The fourth proportional to 20,896.56, 31,303.44 and 12,578.76 is: 18,843.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,896.56 : 31,303.44 = 12,578.76 : x
  2. Step 2: Convert to fraction form
    20,896.56/31,303.44 = 12,578.76/x
  3. Step 3: Cross multiply
    20,896.56x = 31,303.44 × 12,578.76
  4. Step 4: Simplify right side
    20,896.56x = 393,758,458.93
  5. Step 5: Solve for x
    x = 393,758,458.93/20,896.56
  6. Step 6: Final answer
    x = 18,843.22

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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.