Home / 20,601.10-30,913.80-13,601.35

Finding the Fourth Proportional to 20,601.10, 30,913.80 and 13,601.35

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Solution

The fourth proportional to 20,601.10, 30,913.80 and 13,601.35 is: 20,410.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,601.10 : 30,913.80 = 13,601.35 : x
  2. Step 2: Convert to fraction form
    20,601.10/30,913.80 = 13,601.35/x
  3. Step 3: Cross multiply
    20,601.10x = 30,913.80 × 13,601.35
  4. Step 4: Simplify right side
    20,601.10x = 420,469,413.63
  5. Step 5: Solve for x
    x = 420,469,413.63/20,601.10
  6. Step 6: Final answer
    x = 20,410.05

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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.