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Finding the Fourth Proportional to 18,888.56, 28,337.09 and 6,408.89

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Solution

The fourth proportional to 18,888.56, 28,337.09 and 6,408.89 is: 9,614.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,888.56 : 28,337.09 = 6,408.89 : x
  2. Step 2: Convert to fraction form
    18,888.56/28,337.09 = 6,408.89/x
  3. Step 3: Cross multiply
    18,888.56x = 28,337.09 × 6,408.89
  4. Step 4: Simplify right side
    18,888.56x = 181,609,292.73
  5. Step 5: Solve for x
    x = 181,609,292.73/18,888.56
  6. Step 6: Final answer
    x = 9,614.78

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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.