Home / 20,155.62-30,081-19,630.74

Finding the Fourth Proportional to 20,155.62, 30,081 and 19,630.74

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Solution

The fourth proportional to 20,155.62, 30,081 and 19,630.74 is: 29,297.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.62 : 30,081 = 19,630.74 : x
  2. Step 2: Convert to fraction form
    20,155.62/30,081 = 19,630.74/x
  3. Step 3: Cross multiply
    20,155.62x = 30,081 × 19,630.74
  4. Step 4: Simplify right side
    20,155.62x = 590,512,289.94
  5. Step 5: Solve for x
    x = 590,512,289.94/20,155.62
  6. Step 6: Final answer
    x = 29,297.65

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.