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Finding the Fourth Proportional to 8,819.70, 13,230.72 and 4,659.88

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Solution

The fourth proportional to 8,819.70, 13,230.72 and 4,659.88 is: 6,990.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,819.70 : 13,230.72 = 4,659.88 : x
  2. Step 2: Convert to fraction form
    8,819.70/13,230.72 = 4,659.88/x
  3. Step 3: Cross multiply
    8,819.70x = 13,230.72 × 4,659.88
  4. Step 4: Simplify right side
    8,819.70x = 61,653,533.76
  5. Step 5: Solve for x
    x = 61,653,533.76/8,819.70
  6. Step 6: Final answer
    x = 6,990.43

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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.