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Finding the Fourth Proportional to 12,767.68, 17,619.56 and 7,178.68

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Solution

The fourth proportional to 12,767.68, 17,619.56 and 7,178.68 is: 9,906.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,767.68 : 17,619.56 = 7,178.68 : x
  2. Step 2: Convert to fraction form
    12,767.68/17,619.56 = 7,178.68/x
  3. Step 3: Cross multiply
    12,767.68x = 17,619.56 × 7,178.68
  4. Step 4: Simplify right side
    12,767.68x = 126,485,182.98
  5. Step 5: Solve for x
    x = 126,485,182.98/12,767.68
  6. Step 6: Final answer
    x = 9,906.67

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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.