Home / 20,680.48-28,540.54-11,728.76

Finding the Fourth Proportional to 20,680.48, 28,540.54 and 11,728.76

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Solution

The fourth proportional to 20,680.48, 28,540.54 and 11,728.76 is: 16,186.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.48 : 28,540.54 = 11,728.76 : x
  2. Step 2: Convert to fraction form
    20,680.48/28,540.54 = 11,728.76/x
  3. Step 3: Cross multiply
    20,680.48x = 28,540.54 × 11,728.76
  4. Step 4: Simplify right side
    20,680.48x = 334,745,143.93
  5. Step 5: Solve for x
    x = 334,745,143.93/20,680.48
  6. Step 6: Final answer
    x = 16,186.53

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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.