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Finding the Fourth Proportional to 13,711.73, 18,916.79 and 8,335.05

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Solution

The fourth proportional to 13,711.73, 18,916.79 and 8,335.05 is: 11,499.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,711.73 : 18,916.79 = 8,335.05 : x
  2. Step 2: Convert to fraction form
    13,711.73/18,916.79 = 8,335.05/x
  3. Step 3: Cross multiply
    13,711.73x = 18,916.79 × 8,335.05
  4. Step 4: Simplify right side
    13,711.73x = 157,672,431.17
  5. Step 5: Solve for x
    x = 157,672,431.17/13,711.73
  6. Step 6: Final answer
    x = 11,499.09

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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.