Home / 20,985,768.69-28,960,420.77-12,166,933.81

Finding the Fourth Proportional to 20,985,768.69, 28,960,420.77 and 12,166,933.81

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Solution

The fourth proportional to 20,985,768.69, 28,960,420.77 and 12,166,933.81 is: 16,790,403.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985,768.69 : 28,960,420.77 = 12,166,933.81 : x
  2. Step 2: Convert to fraction form
    20,985,768.69/28,960,420.77 = 12,166,933.81/x
  3. Step 3: Cross multiply
    20,985,768.69x = 28,960,420.77 × 12,166,933.81
  4. Step 4: Simplify right side
    20,985,768.69x = 352,359,522,412,702.44
  5. Step 5: Solve for x
    x = 352,359,522,412,702.44/20,985,768.69
  6. Step 6: Final answer
    x = 16,790,403.43

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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.