Home / 20,165.28-27,825.60-12,211.20

Finding the Fourth Proportional to 20,165.28, 27,825.60 and 12,211.20

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Solution

The fourth proportional to 20,165.28, 27,825.60 and 12,211.20 is: 16,849.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,165.28 : 27,825.60 = 12,211.20 : x
  2. Step 2: Convert to fraction form
    20,165.28/27,825.60 = 12,211.20/x
  3. Step 3: Cross multiply
    20,165.28x = 27,825.60 × 12,211.20
  4. Step 4: Simplify right side
    20,165.28x = 339,783,966.72
  5. Step 5: Solve for x
    x = 339,783,966.72/20,165.28
  6. Step 6: Final answer
    x = 16,849.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.