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Finding the Fourth Proportional to 28,568.97, 42,839.42 and 11,924.01

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Solution

The fourth proportional to 28,568.97, 42,839.42 and 11,924.01 is: 17,880.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,568.97 : 42,839.42 = 11,924.01 : x
  2. Step 2: Convert to fraction form
    28,568.97/42,839.42 = 11,924.01/x
  3. Step 3: Cross multiply
    28,568.97x = 42,839.42 × 11,924.01
  4. Step 4: Simplify right side
    28,568.97x = 510,817,612.85
  5. Step 5: Solve for x
    x = 510,817,612.85/28,568.97
  6. Step 6: Final answer
    x = 17,880.16

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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.