Home / 20,736.55-31,080.21-11,953.32

Finding the Fourth Proportional to 20,736.55, 31,080.21 and 11,953.32

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Solution

The fourth proportional to 20,736.55, 31,080.21 and 11,953.32 is: 17,915.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,736.55 : 31,080.21 = 11,953.32 : x
  2. Step 2: Convert to fraction form
    20,736.55/31,080.21 = 11,953.32/x
  3. Step 3: Cross multiply
    20,736.55x = 31,080.21 × 11,953.32
  4. Step 4: Simplify right side
    20,736.55x = 371,511,695.80
  5. Step 5: Solve for x
    x = 371,511,695.80/20,736.55
  6. Step 6: Final answer
    x = 17,915.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.