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Finding the Fourth Proportional to 8,919.90, 13,388.07 and 4,540.50

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Solution

The fourth proportional to 8,919.90, 13,388.07 and 4,540.50 is: 6,814.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.90 : 13,388.07 = 4,540.50 : x
  2. Step 2: Convert to fraction form
    8,919.90/13,388.07 = 4,540.50/x
  3. Step 3: Cross multiply
    8,919.90x = 13,388.07 × 4,540.50
  4. Step 4: Simplify right side
    8,919.90x = 60,788,531.84
  5. Step 5: Solve for x
    x = 60,788,531.84/8,919.90
  6. Step 6: Final answer
    x = 6,814.93

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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.