Home / 20,246.40-27,928.80-11,861.28

Finding the Fourth Proportional to 20,246.40, 27,928.80 and 11,861.28

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Solution

The fourth proportional to 20,246.40, 27,928.80 and 11,861.28 is: 16,361.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,246.40 : 27,928.80 = 11,861.28 : x
  2. Step 2: Convert to fraction form
    20,246.40/27,928.80 = 11,861.28/x
  3. Step 3: Cross multiply
    20,246.40x = 27,928.80 × 11,861.28
  4. Step 4: Simplify right side
    20,246.40x = 331,271,316.86
  5. Step 5: Solve for x
    x = 331,271,316.86/20,246.40
  6. Step 6: Final answer
    x = 16,361.99

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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.