Home / 20,439.50-30,661.25-7,960.55

Finding the Fourth Proportional to 20,439.50, 30,661.25 and 7,960.55

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Solution

The fourth proportional to 20,439.50, 30,661.25 and 7,960.55 is: 11,941.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.50 : 30,661.25 = 7,960.55 : x
  2. Step 2: Convert to fraction form
    20,439.50/30,661.25 = 7,960.55/x
  3. Step 3: Cross multiply
    20,439.50x = 30,661.25 × 7,960.55
  4. Step 4: Simplify right side
    20,439.50x = 244,080,220.58
  5. Step 5: Solve for x
    x = 244,080,220.58/20,439.50
  6. Step 6: Final answer
    x = 11,941.60

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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.