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Finding the Fourth Proportional to 20,672,497.22, 28,529,692.02 and 11,970,821.52

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Solution

The fourth proportional to 20,672,497.22, 28,529,692.02 and 11,970,821.52 is: 16,520,686.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,672,497.22 : 28,529,692.02 = 11,970,821.52 : x
  2. Step 2: Convert to fraction form
    20,672,497.22/28,529,692.02 = 11,970,821.52/x
  3. Step 3: Cross multiply
    20,672,497.22x = 28,529,692.02 × 11,970,821.52
  4. Step 4: Simplify right side
    20,672,497.22x = 341,523,851,191,988.25
  5. Step 5: Solve for x
    x = 341,523,851,191,988.25/20,672,497.22
  6. Step 6: Final answer
    x = 16,520,686.77

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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.