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Finding the Fourth Proportional to 12,775.67, 17,630.41 and 7,186.67

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Solution

The fourth proportional to 12,775.67, 17,630.41 and 7,186.67 is: 9,917.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,775.67 : 17,630.41 = 7,186.67 : x
  2. Step 2: Convert to fraction form
    12,775.67/17,630.41 = 7,186.67/x
  3. Step 3: Cross multiply
    12,775.67x = 17,630.41 × 7,186.67
  4. Step 4: Simplify right side
    12,775.67x = 126,703,938.63
  5. Step 5: Solve for x
    x = 126,703,938.63/12,775.67
  6. Step 6: Final answer
    x = 9,917.60

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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.