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Finding the Fourth Proportional to 8,819.88, 12,170.82 and 4,840.21

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Solution

The fourth proportional to 8,819.88, 12,170.82 and 4,840.21 is: 6,679.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,819.88 : 12,170.82 = 4,840.21 : x
  2. Step 2: Convert to fraction form
    8,819.88/12,170.82 = 4,840.21/x
  3. Step 3: Cross multiply
    8,819.88x = 12,170.82 × 4,840.21
  4. Step 4: Simplify right side
    8,819.88x = 58,909,324.67
  5. Step 5: Solve for x
    x = 58,909,324.67/8,819.88
  6. Step 6: Final answer
    x = 6,679.15

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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.