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Finding the Fourth Proportional to 8,914.56, 12,305.19 and 5,139.24

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Solution

The fourth proportional to 8,914.56, 12,305.19 and 5,139.24 is: 7,093.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,914.56 : 12,305.19 = 5,139.24 : x
  2. Step 2: Convert to fraction form
    8,914.56/12,305.19 = 5,139.24/x
  3. Step 3: Cross multiply
    8,914.56x = 12,305.19 × 5,139.24
  4. Step 4: Simplify right side
    8,914.56x = 63,239,324.66
  5. Step 5: Solve for x
    x = 63,239,324.66/8,914.56
  6. Step 6: Final answer
    x = 7,093.94

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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.