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Finding the Fourth Proportional to 28,375.68, 42,512.90 and 17,276.64

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Solution

The fourth proportional to 28,375.68, 42,512.90 and 17,276.64 is: 25,884.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,375.68 : 42,512.90 = 17,276.64 : x
  2. Step 2: Convert to fraction form
    28,375.68/42,512.90 = 17,276.64/x
  3. Step 3: Cross multiply
    28,375.68x = 42,512.90 × 17,276.64
  4. Step 4: Simplify right side
    28,375.68x = 734,480,068.66
  5. Step 5: Solve for x
    x = 734,480,068.66/28,375.68
  6. Step 6: Final answer
    x = 25,884.14

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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.