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Finding the Fourth Proportional to 10,866.80, 16,305.60 and 4,293.20

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Solution

The fourth proportional to 10,866.80, 16,305.60 and 4,293.20 is: 6,441.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,866.80 : 16,305.60 = 4,293.20 : x
  2. Step 2: Convert to fraction form
    10,866.80/16,305.60 = 4,293.20/x
  3. Step 3: Cross multiply
    10,866.80x = 16,305.60 × 4,293.20
  4. Step 4: Simplify right side
    10,866.80x = 70,003,201.92
  5. Step 5: Solve for x
    x = 70,003,201.92/10,866.80
  6. Step 6: Final answer
    x = 6,441.93

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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.