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Finding the Fourth Proportional to 18,306.81, 27,453.72 and 7,912.89

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Solution

The fourth proportional to 18,306.81, 27,453.72 and 7,912.89 is: 11,866.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,306.81 : 27,453.72 = 7,912.89 : x
  2. Step 2: Convert to fraction form
    18,306.81/27,453.72 = 7,912.89/x
  3. Step 3: Cross multiply
    18,306.81x = 27,453.72 × 7,912.89
  4. Step 4: Simplify right side
    18,306.81x = 217,238,266.45
  5. Step 5: Solve for x
    x = 217,238,266.45/18,306.81
  6. Step 6: Final answer
    x = 11,866.53

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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.