Home / 20,763.38-28,653.86-12,379.88

Finding the Fourth Proportional to 20,763.38, 28,653.86 and 12,379.88

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Solution

The fourth proportional to 20,763.38, 28,653.86 and 12,379.88 is: 17,084.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,763.38 : 28,653.86 = 12,379.88 : x
  2. Step 2: Convert to fraction form
    20,763.38/28,653.86 = 12,379.88/x
  3. Step 3: Cross multiply
    20,763.38x = 28,653.86 × 12,379.88
  4. Step 4: Simplify right side
    20,763.38x = 354,731,236.02
  5. Step 5: Solve for x
    x = 354,731,236.02/20,763.38
  6. Step 6: Final answer
    x = 17,084.47

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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.