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Finding the Fourth Proportional to 19,615.88, 27,051.36 and 12,530

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Solution

The fourth proportional to 19,615.88, 27,051.36 and 12,530 is: 17,279.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,615.88 : 27,051.36 = 12,530 : x
  2. Step 2: Convert to fraction form
    19,615.88/27,051.36 = 12,530/x
  3. Step 3: Cross multiply
    19,615.88x = 27,051.36 × 12,530
  4. Step 4: Simplify right side
    19,615.88x = 338,953,540.80
  5. Step 5: Solve for x
    x = 338,953,540.80/19,615.88
  6. Step 6: Final answer
    x = 17,279.55

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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.