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Finding the Fourth Proportional to 10,819.20, 16,228.80 and 9,361.20

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Solution

The fourth proportional to 10,819.20, 16,228.80 and 9,361.20 is: 14,041.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,819.20 : 16,228.80 = 9,361.20 : x
  2. Step 2: Convert to fraction form
    10,819.20/16,228.80 = 9,361.20/x
  3. Step 3: Cross multiply
    10,819.20x = 16,228.80 × 9,361.20
  4. Step 4: Simplify right side
    10,819.20x = 151,921,042.56
  5. Step 5: Solve for x
    x = 151,921,042.56/10,819.20
  6. Step 6: Final answer
    x = 14,041.80

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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.