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Finding the Fourth Proportional to 8,538.80, 12,810.60 and 3,610.80

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Solution

The fourth proportional to 8,538.80, 12,810.60 and 3,610.80 is: 5,417.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,538.80 : 12,810.60 = 3,610.80 : x
  2. Step 2: Convert to fraction form
    8,538.80/12,810.60 = 3,610.80/x
  3. Step 3: Cross multiply
    8,538.80x = 12,810.60 × 3,610.80
  4. Step 4: Simplify right side
    8,538.80x = 46,256,514.48
  5. Step 5: Solve for x
    x = 46,256,514.48/8,538.80
  6. Step 6: Final answer
    x = 5,417.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.