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Finding the Fourth Proportional to 12,620.58, 17,414.88 and 7,242.74

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Solution

The fourth proportional to 12,620.58, 17,414.88 and 7,242.74 is: 9,994.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.58 : 17,414.88 = 7,242.74 : x
  2. Step 2: Convert to fraction form
    12,620.58/17,414.88 = 7,242.74/x
  3. Step 3: Cross multiply
    12,620.58x = 17,414.88 × 7,242.74
  4. Step 4: Simplify right side
    12,620.58x = 126,131,447.97
  5. Step 5: Solve for x
    x = 126,131,447.97/12,620.58
  6. Step 6: Final answer
    x = 9,994.11

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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.