Home / 20,425.74-30,640.50-7,946.72

Finding the Fourth Proportional to 20,425.74, 30,640.50 and 7,946.72

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Solution

The fourth proportional to 20,425.74, 30,640.50 and 7,946.72 is: 11,920.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.74 : 30,640.50 = 7,946.72 : x
  2. Step 2: Convert to fraction form
    20,425.74/30,640.50 = 7,946.72/x
  3. Step 3: Cross multiply
    20,425.74x = 30,640.50 × 7,946.72
  4. Step 4: Simplify right side
    20,425.74x = 243,491,320.96
  5. Step 5: Solve for x
    x = 243,491,320.96/20,425.74
  6. Step 6: Final answer
    x = 11,920.81

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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.