Home / 28,255.96-38,992.86-15,680.44

Finding the Fourth Proportional to 28,255.96, 38,992.86 and 15,680.44

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Solution

The fourth proportional to 28,255.96, 38,992.86 and 15,680.44 is: 21,638.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,255.96 : 38,992.86 = 15,680.44 : x
  2. Step 2: Convert to fraction form
    28,255.96/38,992.86 = 15,680.44/x
  3. Step 3: Cross multiply
    28,255.96x = 38,992.86 × 15,680.44
  4. Step 4: Simplify right side
    28,255.96x = 611,425,201.66
  5. Step 5: Solve for x
    x = 611,425,201.66/28,255.96
  6. Step 6: Final answer
    x = 21,638.80

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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.