Home / 20,485.94-30,740.85-8,638.98

Finding the Fourth Proportional to 20,485.94, 30,740.85 and 8,638.98

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Solution

The fourth proportional to 20,485.94, 30,740.85 and 8,638.98 is: 12,963.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.94 : 30,740.85 = 8,638.98 : x
  2. Step 2: Convert to fraction form
    20,485.94/30,740.85 = 8,638.98/x
  3. Step 3: Cross multiply
    20,485.94x = 30,740.85 × 8,638.98
  4. Step 4: Simplify right side
    20,485.94x = 265,569,620.73
  5. Step 5: Solve for x
    x = 265,569,620.73/20,485.94
  6. Step 6: Final answer
    x = 12,963.51

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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.