Home / 19,975.20-29,966.40-8,289.60

Finding the Fourth Proportional to 19,975.20, 29,966.40 and 8,289.60

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Solution

The fourth proportional to 19,975.20, 29,966.40 and 8,289.60 is: 12,435.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,975.20 : 29,966.40 = 8,289.60 : x
  2. Step 2: Convert to fraction form
    19,975.20/29,966.40 = 8,289.60/x
  3. Step 3: Cross multiply
    19,975.20x = 29,966.40 × 8,289.60
  4. Step 4: Simplify right side
    19,975.20x = 248,409,469.44
  5. Step 5: Solve for x
    x = 248,409,469.44/19,975.20
  6. Step 6: Final answer
    x = 12,435.89

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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.