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Finding the Fourth Proportional to 18,618.36, 27,900.18 and 13,916.31

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Solution

The fourth proportional to 18,618.36, 27,900.18 and 13,916.31 is: 20,854.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,618.36 : 27,900.18 = 13,916.31 : x
  2. Step 2: Convert to fraction form
    18,618.36/27,900.18 = 13,916.31/x
  3. Step 3: Cross multiply
    18,618.36x = 27,900.18 × 13,916.31
  4. Step 4: Simplify right side
    18,618.36x = 388,267,553.94
  5. Step 5: Solve for x
    x = 388,267,553.94/18,618.36
  6. Step 6: Final answer
    x = 20,854.01

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1.5x scale

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.