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Finding the Fourth Proportional to 28,573.74, 42,876.81 and 15,425.82

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Solution

The fourth proportional to 28,573.74, 42,876.81 and 15,425.82 is: 23,147.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,573.74 : 42,876.81 = 15,425.82 : x
  2. Step 2: Convert to fraction form
    28,573.74/42,876.81 = 15,425.82/x
  3. Step 3: Cross multiply
    28,573.74x = 42,876.81 × 15,425.82
  4. Step 4: Simplify right side
    28,573.74x = 661,409,953.23
  5. Step 5: Solve for x
    x = 661,409,953.23/28,573.74
  6. Step 6: Final answer
    x = 23,147.48

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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.