Home / 20,688,503.20-28,550,132.42-11,991,720.38

Finding the Fourth Proportional to 20,688,503.20, 28,550,132.42 and 11,991,720.38

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Solution

The fourth proportional to 20,688,503.20, 28,550,132.42 and 11,991,720.38 is: 16,548,572.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688,503.20 : 28,550,132.42 = 11,991,720.38 : x
  2. Step 2: Convert to fraction form
    20,688,503.20/28,550,132.42 = 11,991,720.38/x
  3. Step 3: Cross multiply
    20,688,503.20x = 28,550,132.42 × 11,991,720.38
  4. Step 4: Simplify right side
    20,688,503.20x = 342,365,204,589,903.44
  5. Step 5: Solve for x
    x = 342,365,204,589,903.44/20,688,503.20
  6. Step 6: Final answer
    x = 16,548,572.96

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1.5x scale

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.