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Finding the Fourth Proportional to 12,630.97, 17,420.50 and 11,115.27

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Solution

The fourth proportional to 12,630.97, 17,420.50 and 11,115.27 is: 15,330.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,630.97 : 17,420.50 = 11,115.27 : x
  2. Step 2: Convert to fraction form
    12,630.97/17,420.50 = 11,115.27/x
  3. Step 3: Cross multiply
    12,630.97x = 17,420.50 × 11,115.27
  4. Step 4: Simplify right side
    12,630.97x = 193,633,561.04
  5. Step 5: Solve for x
    x = 193,633,561.04/12,630.97
  6. Step 6: Final answer
    x = 15,330.06

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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.