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Finding the Fourth Proportional to 12,894.69, 19,338.93 and 8,207.67

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Solution

The fourth proportional to 12,894.69, 19,338.93 and 8,207.67 is: 12,309.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,894.69 : 19,338.93 = 8,207.67 : x
  2. Step 2: Convert to fraction form
    12,894.69/19,338.93 = 8,207.67/x
  3. Step 3: Cross multiply
    12,894.69x = 19,338.93 × 8,207.67
  4. Step 4: Simplify right side
    12,894.69x = 158,727,555.59
  5. Step 5: Solve for x
    x = 158,727,555.59/12,894.69
  6. Step 6: Final answer
    x = 12,309.53

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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.