Home / 20,912.04-31,360.32-12,601.44

Finding the Fourth Proportional to 20,912.04, 31,360.32 and 12,601.44

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Solution

The fourth proportional to 20,912.04, 31,360.32 and 12,601.44 is: 18,897.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.04 : 31,360.32 = 12,601.44 : x
  2. Step 2: Convert to fraction form
    20,912.04/31,360.32 = 12,601.44/x
  3. Step 3: Cross multiply
    20,912.04x = 31,360.32 × 12,601.44
  4. Step 4: Simplify right side
    20,912.04x = 395,185,190.86
  5. Step 5: Solve for x
    x = 395,185,190.86/20,912.04
  6. Step 6: Final answer
    x = 18,897.50

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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.