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Finding the Fourth Proportional to 20,754.64, 28,641.18 and 11,323

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Solution

The fourth proportional to 20,754.64, 28,641.18 and 11,323 is: 15,625.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,754.64 : 28,641.18 = 11,323 : x
  2. Step 2: Convert to fraction form
    20,754.64/28,641.18 = 11,323/x
  3. Step 3: Cross multiply
    20,754.64x = 28,641.18 × 11,323
  4. Step 4: Simplify right side
    20,754.64x = 324,304,081.14
  5. Step 5: Solve for x
    x = 324,304,081.14/20,754.64
  6. Step 6: Final answer
    x = 15,625.62

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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.