Home / 20,078.18-27,707.92-11,125.60

Finding the Fourth Proportional to 20,078.18, 27,707.92 and 11,125.60

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Solution

The fourth proportional to 20,078.18, 27,707.92 and 11,125.60 is: 15,353.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.18 : 27,707.92 = 11,125.60 : x
  2. Step 2: Convert to fraction form
    20,078.18/27,707.92 = 11,125.60/x
  3. Step 3: Cross multiply
    20,078.18x = 27,707.92 × 11,125.60
  4. Step 4: Simplify right side
    20,078.18x = 308,267,234.75
  5. Step 5: Solve for x
    x = 308,267,234.75/20,078.18
  6. Step 6: Final answer
    x = 15,353.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.