Home / 20,103.85-30,157.21-5,312.44

Finding the Fourth Proportional to 20,103.85, 30,157.21 and 5,312.44

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Solution

The fourth proportional to 20,103.85, 30,157.21 and 5,312.44 is: 7,969.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,103.85 : 30,157.21 = 5,312.44 : x
  2. Step 2: Convert to fraction form
    20,103.85/30,157.21 = 5,312.44/x
  3. Step 3: Cross multiply
    20,103.85x = 30,157.21 × 5,312.44
  4. Step 4: Simplify right side
    20,103.85x = 160,208,243.40
  5. Step 5: Solve for x
    x = 160,208,243.40/20,103.85
  6. Step 6: Final answer
    x = 7,969.03

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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.