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Finding the Fourth Proportional to 21,508,978.20, 32,263,467.30 and 16,638,091.80

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Solution

The fourth proportional to 21,508,978.20, 32,263,467.30 and 16,638,091.80 is: 24,957,137.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,508,978.20 : 32,263,467.30 = 16,638,091.80 : x
  2. Step 2: Convert to fraction form
    21,508,978.20/32,263,467.30 = 16,638,091.80/x
  3. Step 3: Cross multiply
    21,508,978.20x = 32,263,467.30 × 16,638,091.80
  4. Step 4: Simplify right side
    21,508,978.20x = 536,802,530,723,698.19
  5. Step 5: Solve for x
    x = 536,802,530,723,698.19/21,508,978.20
  6. Step 6: Final answer
    x = 24,957,137.70

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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.