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Finding the Fourth Proportional to 8,914.44, 12,299.10 and 5,187.72

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Solution

The fourth proportional to 8,914.44, 12,299.10 and 5,187.72 is: 7,157.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,914.44 : 12,299.10 = 5,187.72 : x
  2. Step 2: Convert to fraction form
    8,914.44/12,299.10 = 5,187.72/x
  3. Step 3: Cross multiply
    8,914.44x = 12,299.10 × 5,187.72
  4. Step 4: Simplify right side
    8,914.44x = 63,804,287.05
  5. Step 5: Solve for x
    x = 63,804,287.05/8,914.44
  6. Step 6: Final answer
    x = 7,157.41

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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.