Home / 20,425.56-28,188.90-11,475.06

Finding the Fourth Proportional to 20,425.56, 28,188.90 and 11,475.06

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Solution

The fourth proportional to 20,425.56, 28,188.90 and 11,475.06 is: 15,836.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.56 : 28,188.90 = 11,475.06 : x
  2. Step 2: Convert to fraction form
    20,425.56/28,188.90 = 11,475.06/x
  3. Step 3: Cross multiply
    20,425.56x = 28,188.90 × 11,475.06
  4. Step 4: Simplify right side
    20,425.56x = 323,469,318.83
  5. Step 5: Solve for x
    x = 323,469,318.83/20,425.56
  6. Step 6: Final answer
    x = 15,836.50

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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.