Home / 20,801.20-28,697.48-12,829.60

Finding the Fourth Proportional to 20,801.20, 28,697.48 and 12,829.60

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Solution

The fourth proportional to 20,801.20, 28,697.48 and 12,829.60 is: 17,699.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.20 : 28,697.48 = 12,829.60 : x
  2. Step 2: Convert to fraction form
    20,801.20/28,697.48 = 12,829.60/x
  3. Step 3: Cross multiply
    20,801.20x = 28,697.48 × 12,829.60
  4. Step 4: Simplify right side
    20,801.20x = 368,177,189.41
  5. Step 5: Solve for x
    x = 368,177,189.41/20,801.20
  6. Step 6: Final answer
    x = 17,699.81

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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.