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Finding the Fourth Proportional to 8,805.13, 13,212.36 and 3,878.21

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Solution

The fourth proportional to 8,805.13, 13,212.36 and 3,878.21 is: 5,819.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,805.13 : 13,212.36 = 3,878.21 : x
  2. Step 2: Convert to fraction form
    8,805.13/13,212.36 = 3,878.21/x
  3. Step 3: Cross multiply
    8,805.13x = 13,212.36 × 3,878.21
  4. Step 4: Simplify right side
    8,805.13x = 51,240,339.71
  5. Step 5: Solve for x
    x = 51,240,339.71/8,805.13
  6. Step 6: Final answer
    x = 5,819.38

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1.5x scale

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.