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Finding the Fourth Proportional to 18,900.48, 28,324.80 and 11,962.56

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Solution

The fourth proportional to 18,900.48, 28,324.80 and 11,962.56 is: 17,927.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,900.48 : 28,324.80 = 11,962.56 : x
  2. Step 2: Convert to fraction form
    18,900.48/28,324.80 = 11,962.56/x
  3. Step 3: Cross multiply
    18,900.48x = 28,324.80 × 11,962.56
  4. Step 4: Simplify right side
    18,900.48x = 338,837,119.49
  5. Step 5: Solve for x
    x = 338,837,119.49/18,900.48
  6. Step 6: Final answer
    x = 17,927.43

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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.