Home / 13,929.45-20,912.72-8,090.25

Finding the Fourth Proportional to 13,929.45, 20,912.72 and 8,090.25

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Solution

The fourth proportional to 13,929.45, 20,912.72 and 8,090.25 is: 12,146.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,929.45 : 20,912.72 = 8,090.25 : x
  2. Step 2: Convert to fraction form
    13,929.45/20,912.72 = 8,090.25/x
  3. Step 3: Cross multiply
    13,929.45x = 20,912.72 × 8,090.25
  4. Step 4: Simplify right side
    13,929.45x = 169,189,132.98
  5. Step 5: Solve for x
    x = 169,189,132.98/13,929.45
  6. Step 6: Final answer
    x = 12,146.15

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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.