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Finding the Fourth Proportional to 12,615.63, 18,926.28 and 6,375.39

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Solution

The fourth proportional to 12,615.63, 18,926.28 and 6,375.39 is: 9,564.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,615.63 : 18,926.28 = 6,375.39 : x
  2. Step 2: Convert to fraction form
    12,615.63/18,926.28 = 6,375.39/x
  3. Step 3: Cross multiply
    12,615.63x = 18,926.28 × 6,375.39
  4. Step 4: Simplify right side
    12,615.63x = 120,662,416.25
  5. Step 5: Solve for x
    x = 120,662,416.25/12,615.63
  6. Step 6: Final answer
    x = 9,564.52

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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.