Home / 21,205.60-31,819.34-8,734.84

Finding the Fourth Proportional to 21,205.60, 31,819.34 and 8,734.84

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Solution

The fourth proportional to 21,205.60, 31,819.34 and 8,734.84 is: 13,106.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,205.60 : 31,819.34 = 8,734.84 : x
  2. Step 2: Convert to fraction form
    21,205.60/31,819.34 = 8,734.84/x
  3. Step 3: Cross multiply
    21,205.60x = 31,819.34 × 8,734.84
  4. Step 4: Simplify right side
    21,205.60x = 277,936,923.35
  5. Step 5: Solve for x
    x = 277,936,923.35/21,205.60
  6. Step 6: Final answer
    x = 13,106.77

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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.