Home / 20,213.28-30,321.74-9,125.19

Finding the Fourth Proportional to 20,213.28, 30,321.74 and 9,125.19

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Solution

The fourth proportional to 20,213.28, 30,321.74 and 9,125.19 is: 13,688.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,213.28 : 30,321.74 = 9,125.19 : x
  2. Step 2: Convert to fraction form
    20,213.28/30,321.74 = 9,125.19/x
  3. Step 3: Cross multiply
    20,213.28x = 30,321.74 × 9,125.19
  4. Step 4: Simplify right side
    20,213.28x = 276,691,638.63
  5. Step 5: Solve for x
    x = 276,691,638.63/20,213.28
  6. Step 6: Final answer
    x = 13,688.61

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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.