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Finding the Fourth Proportional to 13,650.80, 18,829.56 and 8,610.80

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Solution

The fourth proportional to 13,650.80, 18,829.56 and 8,610.80 is: 11,877.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,650.80 : 18,829.56 = 8,610.80 : x
  2. Step 2: Convert to fraction form
    13,650.80/18,829.56 = 8,610.80/x
  3. Step 3: Cross multiply
    13,650.80x = 18,829.56 × 8,610.80
  4. Step 4: Simplify right side
    13,650.80x = 162,137,575.25
  5. Step 5: Solve for x
    x = 162,137,575.25/13,650.80
  6. Step 6: Final answer
    x = 11,877.51

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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.