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Finding the Fourth Proportional to 12,607.22, 18,891.38 and 7,980.50

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Solution

The fourth proportional to 12,607.22, 18,891.38 and 7,980.50 is: 11,958.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,607.22 : 18,891.38 = 7,980.50 : x
  2. Step 2: Convert to fraction form
    12,607.22/18,891.38 = 7,980.50/x
  3. Step 3: Cross multiply
    12,607.22x = 18,891.38 × 7,980.50
  4. Step 4: Simplify right side
    12,607.22x = 150,762,658.09
  5. Step 5: Solve for x
    x = 150,762,658.09/12,607.22
  6. Step 6: Final answer
    x = 11,958.44

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Double scale
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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.