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Finding the Fourth Proportional to 12,615.21, 17,397.18 and 9,968.94

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Solution

The fourth proportional to 12,615.21, 17,397.18 and 9,968.94 is: 13,747.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,615.21 : 17,397.18 = 9,968.94 : x
  2. Step 2: Convert to fraction form
    12,615.21/17,397.18 = 9,968.94/x
  3. Step 3: Cross multiply
    12,615.21x = 17,397.18 × 9,968.94
  4. Step 4: Simplify right side
    12,615.21x = 173,431,443.59
  5. Step 5: Solve for x
    x = 173,431,443.59/12,615.21
  6. Step 6: Final answer
    x = 13,747.80

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1.5x scale

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.