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Finding the Fourth Proportional to 12,290.96, 18,420.96 and 6,668.44

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Solution

The fourth proportional to 12,290.96, 18,420.96 and 6,668.44 is: 9,994.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,290.96 : 18,420.96 = 6,668.44 : x
  2. Step 2: Convert to fraction form
    12,290.96/18,420.96 = 6,668.44/x
  3. Step 3: Cross multiply
    12,290.96x = 18,420.96 × 6,668.44
  4. Step 4: Simplify right side
    12,290.96x = 122,839,066.50
  5. Step 5: Solve for x
    x = 122,839,066.50/12,290.96
  6. Step 6: Final answer
    x = 9,994.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.