Home / 12,586.78-18,878.95-3,821.77

Finding the Fourth Proportional to 12,586.78, 18,878.95 and 3,821.77

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Solution

The fourth proportional to 12,586.78, 18,878.95 and 3,821.77 is: 5,732.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,586.78 : 18,878.95 = 3,821.77 : x
  2. Step 2: Convert to fraction form
    12,586.78/18,878.95 = 3,821.77/x
  3. Step 3: Cross multiply
    12,586.78x = 18,878.95 × 3,821.77
  4. Step 4: Simplify right side
    12,586.78x = 72,150,891.24
  5. Step 5: Solve for x
    x = 72,150,891.24/12,586.78
  6. Step 6: Final answer
    x = 5,732.28

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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.