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Finding the Fourth Proportional to 12,638.61, 17,449.38 and 11,310

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Solution

The fourth proportional to 12,638.61, 17,449.38 and 11,310 is: 15,615.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,638.61 : 17,449.38 = 11,310 : x
  2. Step 2: Convert to fraction form
    12,638.61/17,449.38 = 11,310/x
  3. Step 3: Cross multiply
    12,638.61x = 17,449.38 × 11,310
  4. Step 4: Simplify right side
    12,638.61x = 197,352,487.80
  5. Step 5: Solve for x
    x = 197,352,487.80/12,638.61
  6. Step 6: Final answer
    x = 15,615.05

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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.