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Finding the Fourth Proportional to 14,987,705.50, 20,684,235.28 and 11,915,582.10

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Solution

The fourth proportional to 14,987,705.50, 20,684,235.28 and 11,915,582.10 is: 16,444,458.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,987,705.50 : 20,684,235.28 = 11,915,582.10 : x
  2. Step 2: Convert to fraction form
    14,987,705.50/20,684,235.28 = 11,915,582.10/x
  3. Step 3: Cross multiply
    14,987,705.50x = 20,684,235.28 × 11,915,582.10
  4. Step 4: Simplify right side
    14,987,705.50x = 246,464,703,654,556.50
  5. Step 5: Solve for x
    x = 246,464,703,654,556.50/14,987,705.50
  6. Step 6: Final answer
    x = 16,444,458.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.