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Finding the Fourth Proportional to 8,543.58, 12,815.75 and 2,620.03

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Solution

The fourth proportional to 8,543.58, 12,815.75 and 2,620.03 is: 3,930.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,543.58 : 12,815.75 = 2,620.03 : x
  2. Step 2: Convert to fraction form
    8,543.58/12,815.75 = 2,620.03/x
  3. Step 3: Cross multiply
    8,543.58x = 12,815.75 × 2,620.03
  4. Step 4: Simplify right side
    8,543.58x = 33,577,648.01
  5. Step 5: Solve for x
    x = 33,577,648.01/8,543.58
  6. Step 6: Final answer
    x = 3,930.16

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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.