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Finding the Fourth Proportional to 21,760.88, 30,028.32 and 12,330.92

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Solution

The fourth proportional to 21,760.88, 30,028.32 and 12,330.92 is: 17,015.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,760.88 : 30,028.32 = 12,330.92 : x
  2. Step 2: Convert to fraction form
    21,760.88/30,028.32 = 12,330.92/x
  3. Step 3: Cross multiply
    21,760.88x = 30,028.32 × 12,330.92
  4. Step 4: Simplify right side
    21,760.88x = 370,276,811.65
  5. Step 5: Solve for x
    x = 370,276,811.65/21,760.88
  6. Step 6: Final answer
    x = 17,015.71

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Double scale
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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.