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Finding the Fourth Proportional to 12,645.64, 18,971.72 and 4,855.08

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Solution

The fourth proportional to 12,645.64, 18,971.72 and 4,855.08 is: 7,283.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,645.64 : 18,971.72 = 4,855.08 : x
  2. Step 2: Convert to fraction form
    12,645.64/18,971.72 = 4,855.08/x
  3. Step 3: Cross multiply
    12,645.64x = 18,971.72 × 4,855.08
  4. Step 4: Simplify right side
    12,645.64x = 92,109,218.34
  5. Step 5: Solve for x
    x = 92,109,218.34/12,645.64
  6. Step 6: Final answer
    x = 7,283.87

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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.