Home / 20,640.02-30,957.59-12,211.56

Finding the Fourth Proportional to 20,640.02, 30,957.59 and 12,211.56

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Solution

The fourth proportional to 20,640.02, 30,957.59 and 12,211.56 is: 18,315.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.02 : 30,957.59 = 12,211.56 : x
  2. Step 2: Convert to fraction form
    20,640.02/30,957.59 = 12,211.56/x
  3. Step 3: Cross multiply
    20,640.02x = 30,957.59 × 12,211.56
  4. Step 4: Simplify right side
    20,640.02x = 378,040,498.27
  5. Step 5: Solve for x
    x = 378,040,498.27/20,640.02
  6. Step 6: Final answer
    x = 18,315.90

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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.