Home / 8,408.78-11,601.60-4,871.90

Finding the Fourth Proportional to 8,408.78, 11,601.60 and 4,871.90

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Solution

The fourth proportional to 8,408.78, 11,601.60 and 4,871.90 is: 6,721.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,408.78 : 11,601.60 = 4,871.90 : x
  2. Step 2: Convert to fraction form
    8,408.78/11,601.60 = 4,871.90/x
  3. Step 3: Cross multiply
    8,408.78x = 11,601.60 × 4,871.90
  4. Step 4: Simplify right side
    8,408.78x = 56,521,835.04
  5. Step 5: Solve for x
    x = 56,521,835.04/8,408.78
  6. Step 6: Final answer
    x = 6,721.76

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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.