Home / 12,889.05-19,329.45-4,121.88

Finding the Fourth Proportional to 12,889.05, 19,329.45 and 4,121.88

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Solution

The fourth proportional to 12,889.05, 19,329.45 and 4,121.88 is: 6,181.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,889.05 : 19,329.45 = 4,121.88 : x
  2. Step 2: Convert to fraction form
    12,889.05/19,329.45 = 4,121.88/x
  3. Step 3: Cross multiply
    12,889.05x = 19,329.45 × 4,121.88
  4. Step 4: Simplify right side
    12,889.05x = 79,673,673.37
  5. Step 5: Solve for x
    x = 79,673,673.37/12,889.05
  6. Step 6: Final answer
    x = 6,181.50

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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.