Home / 11,916.36-16,431.12-8,141.76

Finding the Fourth Proportional to 11,916.36, 16,431.12 and 8,141.76

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Solution

The fourth proportional to 11,916.36, 16,431.12 and 8,141.76 is: 11,226.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,916.36 : 16,431.12 = 8,141.76 : x
  2. Step 2: Convert to fraction form
    11,916.36/16,431.12 = 8,141.76/x
  3. Step 3: Cross multiply
    11,916.36x = 16,431.12 × 8,141.76
  4. Step 4: Simplify right side
    11,916.36x = 133,778,235.57
  5. Step 5: Solve for x
    x = 133,778,235.57/11,916.36
  6. Step 6: Final answer
    x = 11,226.43

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1.5x scale

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.