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Finding the Fourth Proportional to 8,551.54, 11,790.14 and 7,012.78

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Solution

The fourth proportional to 8,551.54, 11,790.14 and 7,012.78 is: 9,668.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,551.54 : 11,790.14 = 7,012.78 : x
  2. Step 2: Convert to fraction form
    8,551.54/11,790.14 = 7,012.78/x
  3. Step 3: Cross multiply
    8,551.54x = 11,790.14 × 7,012.78
  4. Step 4: Simplify right side
    8,551.54x = 82,681,657.99
  5. Step 5: Solve for x
    x = 82,681,657.99/8,551.54
  6. Step 6: Final answer
    x = 9,668.63

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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.