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Finding the Fourth Proportional to 28,425.78, 42,625.71 and 16,742.34

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Solution

The fourth proportional to 28,425.78, 42,625.71 and 16,742.34 is: 25,105.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,425.78 : 42,625.71 = 16,742.34 : x
  2. Step 2: Convert to fraction form
    28,425.78/42,625.71 = 16,742.34/x
  3. Step 3: Cross multiply
    28,425.78x = 42,625.71 × 16,742.34
  4. Step 4: Simplify right side
    28,425.78x = 713,654,129.56
  5. Step 5: Solve for x
    x = 713,654,129.56/28,425.78
  6. Step 6: Final answer
    x = 25,105.88

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1.5x scale

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.