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Finding the Fourth Proportional to 11,916.18, 16,439.09 and 7,133.54

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Solution

The fourth proportional to 11,916.18, 16,439.09 and 7,133.54 is: 9,841.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,916.18 : 16,439.09 = 7,133.54 : x
  2. Step 2: Convert to fraction form
    11,916.18/16,439.09 = 7,133.54/x
  3. Step 3: Cross multiply
    11,916.18x = 16,439.09 × 7,133.54
  4. Step 4: Simplify right side
    11,916.18x = 117,268,788.22
  5. Step 5: Solve for x
    x = 117,268,788.22/11,916.18
  6. Step 6: Final answer
    x = 9,841.14

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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.