Home / 20,103.03-30,155.85-5,311.58

Finding the Fourth Proportional to 20,103.03, 30,155.85 and 5,311.58

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Solution

The fourth proportional to 20,103.03, 30,155.85 and 5,311.58 is: 7,967.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,103.03 : 30,155.85 = 5,311.58 : x
  2. Step 2: Convert to fraction form
    20,103.03/30,155.85 = 5,311.58/x
  3. Step 3: Cross multiply
    20,103.03x = 30,155.85 × 5,311.58
  4. Step 4: Simplify right side
    20,103.03x = 160,175,058.96
  5. Step 5: Solve for x
    x = 160,175,058.96/20,103.03
  6. Step 6: Final answer
    x = 7,967.71

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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.