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Finding the Fourth Proportional to 12,992.20, 17,927.76 and 7,326.88

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Solution

The fourth proportional to 12,992.20, 17,927.76 and 7,326.88 is: 10,110.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,992.20 : 17,927.76 = 7,326.88 : x
  2. Step 2: Convert to fraction form
    12,992.20/17,927.76 = 7,326.88/x
  3. Step 3: Cross multiply
    12,992.20x = 17,927.76 × 7,326.88
  4. Step 4: Simplify right side
    12,992.20x = 131,354,546.19
  5. Step 5: Solve for x
    x = 131,354,546.19/12,992.20
  6. Step 6: Final answer
    x = 10,110.26

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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.