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Finding the Fourth Proportional to 21,902.78, 30,239.51 and 17,383.92

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Solution

The fourth proportional to 21,902.78, 30,239.51 and 17,383.92 is: 24,000.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,902.78 : 30,239.51 = 17,383.92 : x
  2. Step 2: Convert to fraction form
    21,902.78/30,239.51 = 17,383.92/x
  3. Step 3: Cross multiply
    21,902.78x = 30,239.51 × 17,383.92
  4. Step 4: Simplify right side
    21,902.78x = 525,681,135.76
  5. Step 5: Solve for x
    x = 525,681,135.76/21,902.78
  6. Step 6: Final answer
    x = 24,000.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.