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Finding the Fourth Proportional to 10,811.99, 14,907.29 and 8,891.10

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Solution

The fourth proportional to 10,811.99, 14,907.29 and 8,891.10 is: 12,258.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,811.99 : 14,907.29 = 8,891.10 : x
  2. Step 2: Convert to fraction form
    10,811.99/14,907.29 = 8,891.10/x
  3. Step 3: Cross multiply
    10,811.99x = 14,907.29 × 8,891.10
  4. Step 4: Simplify right side
    10,811.99x = 132,542,109.35
  5. Step 5: Solve for x
    x = 132,542,109.35/10,811.99
  6. Step 6: Final answer
    x = 12,258.81

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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.