Home / 15,084.32-20,825.52-11,720.78

Finding the Fourth Proportional to 15,084.32, 20,825.52 and 11,720.78

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Solution

The fourth proportional to 15,084.32, 20,825.52 and 11,720.78 is: 16,181.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,084.32 : 20,825.52 = 11,720.78 : x
  2. Step 2: Convert to fraction form
    15,084.32/20,825.52 = 11,720.78/x
  3. Step 3: Cross multiply
    15,084.32x = 20,825.52 × 11,720.78
  4. Step 4: Simplify right side
    15,084.32x = 244,091,234.18
  5. Step 5: Solve for x
    x = 244,091,234.18/15,084.32
  6. Step 6: Final answer
    x = 16,181.79

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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.