Home / 12,321.60-18,485.70-3,557.28

Finding the Fourth Proportional to 12,321.60, 18,485.70 and 3,557.28

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Solution

The fourth proportional to 12,321.60, 18,485.70 and 3,557.28 is: 5,336.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,321.60 : 18,485.70 = 3,557.28 : x
  2. Step 2: Convert to fraction form
    12,321.60/18,485.70 = 3,557.28/x
  3. Step 3: Cross multiply
    12,321.60x = 18,485.70 × 3,557.28
  4. Step 4: Simplify right side
    12,321.60x = 65,758,810.90
  5. Step 5: Solve for x
    x = 65,758,810.90/12,321.60
  6. Step 6: Final answer
    x = 5,336.87

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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.