Home / 20,899.90-28,841.87-11,947.60

Finding the Fourth Proportional to 20,899.90, 28,841.87 and 11,947.60

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Solution

The fourth proportional to 20,899.90, 28,841.87 and 11,947.60 is: 16,487.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.90 : 28,841.87 = 11,947.60 : x
  2. Step 2: Convert to fraction form
    20,899.90/28,841.87 = 11,947.60/x
  3. Step 3: Cross multiply
    20,899.90x = 28,841.87 × 11,947.60
  4. Step 4: Simplify right side
    20,899.90x = 344,591,066.27
  5. Step 5: Solve for x
    x = 344,591,066.27/20,899.90
  6. Step 6: Final answer
    x = 16,487.69

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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.