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Finding the Fourth Proportional to 8,918.61, 13,370.58 and 3,368.79

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Solution

The fourth proportional to 8,918.61, 13,370.58 and 3,368.79 is: 5,050.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.61 : 13,370.58 = 3,368.79 : x
  2. Step 2: Convert to fraction form
    8,918.61/13,370.58 = 3,368.79/x
  3. Step 3: Cross multiply
    8,918.61x = 13,370.58 × 3,368.79
  4. Step 4: Simplify right side
    8,918.61x = 45,042,676.20
  5. Step 5: Solve for x
    x = 45,042,676.20/8,918.61
  6. Step 6: Final answer
    x = 5,050.41

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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.