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Finding the Fourth Proportional to 21,608.84, 29,820.15 and 11,672.84

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Solution

The fourth proportional to 21,608.84, 29,820.15 and 11,672.84 is: 16,108.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,608.84 : 29,820.15 = 11,672.84 : x
  2. Step 2: Convert to fraction form
    21,608.84/29,820.15 = 11,672.84/x
  3. Step 3: Cross multiply
    21,608.84x = 29,820.15 × 11,672.84
  4. Step 4: Simplify right side
    21,608.84x = 348,085,839.73
  5. Step 5: Solve for x
    x = 348,085,839.73/21,608.84
  6. Step 6: Final answer
    x = 16,108.49

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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.