Home / 12,886.47-19,329.45-4,121.37

Finding the Fourth Proportional to 12,886.47, 19,329.45 and 4,121.37

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Solution

The fourth proportional to 12,886.47, 19,329.45 and 4,121.37 is: 6,181.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,886.47 : 19,329.45 = 4,121.37 : x
  2. Step 2: Convert to fraction form
    12,886.47/19,329.45 = 4,121.37/x
  3. Step 3: Cross multiply
    12,886.47x = 19,329.45 × 4,121.37
  4. Step 4: Simplify right side
    12,886.47x = 79,663,815.35
  5. Step 5: Solve for x
    x = 79,663,815.35/12,886.47
  6. Step 6: Final answer
    x = 6,181.97

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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.