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Finding the Fourth Proportional to 18,139.10, 27,239.31 and 11,133.14

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Solution

The fourth proportional to 18,139.10, 27,239.31 and 11,133.14 is: 16,718.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,139.10 : 27,239.31 = 11,133.14 : x
  2. Step 2: Convert to fraction form
    18,139.10/27,239.31 = 11,133.14/x
  3. Step 3: Cross multiply
    18,139.10x = 27,239.31 × 11,133.14
  4. Step 4: Simplify right side
    18,139.10x = 303,258,915.54
  5. Step 5: Solve for x
    x = 303,258,915.54/18,139.10
  6. Step 6: Final answer
    x = 16,718.53

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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.