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Finding the Fourth Proportional to 18,914.79, 28,393.72 and 9,565.37

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Solution

The fourth proportional to 18,914.79, 28,393.72 and 9,565.37 is: 14,358.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,914.79 : 28,393.72 = 9,565.37 : x
  2. Step 2: Convert to fraction form
    18,914.79/28,393.72 = 9,565.37/x
  3. Step 3: Cross multiply
    18,914.79x = 28,393.72 × 9,565.37
  4. Step 4: Simplify right side
    18,914.79x = 271,596,413.94
  5. Step 5: Solve for x
    x = 271,596,413.94/18,914.79
  6. Step 6: Final answer
    x = 14,358.94

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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.