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Finding the Fourth Proportional to 28,125.90, 42,090.03 and 22,221

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Solution

The fourth proportional to 28,125.90, 42,090.03 and 22,221 is: 33,253.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,125.90 : 42,090.03 = 22,221 : x
  2. Step 2: Convert to fraction form
    28,125.90/42,090.03 = 22,221/x
  3. Step 3: Cross multiply
    28,125.90x = 42,090.03 × 22,221
  4. Step 4: Simplify right side
    28,125.90x = 935,282,556.63
  5. Step 5: Solve for x
    x = 935,282,556.63/28,125.90
  6. Step 6: Final answer
    x = 33,253.43

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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.