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Finding the Fourth Proportional to 8,918.94, 13,379.13 and 2,678.52

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Solution

The fourth proportional to 8,918.94, 13,379.13 and 2,678.52 is: 4,018.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.94 : 13,379.13 = 2,678.52 : x
  2. Step 2: Convert to fraction form
    8,918.94/13,379.13 = 2,678.52/x
  3. Step 3: Cross multiply
    8,918.94x = 13,379.13 × 2,678.52
  4. Step 4: Simplify right side
    8,918.94x = 35,836,267.29
  5. Step 5: Solve for x
    x = 35,836,267.29/8,918.94
  6. Step 6: Final answer
    x = 4,018.00

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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.