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Finding the Fourth Proportional to 21,608.94, 29,820.35 and 11,672.94

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Solution

The fourth proportional to 21,608.94, 29,820.35 and 11,672.94 is: 16,108.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,608.94 : 29,820.35 = 11,672.94 : x
  2. Step 2: Convert to fraction form
    21,608.94/29,820.35 = 11,672.94/x
  3. Step 3: Cross multiply
    21,608.94x = 29,820.35 × 11,672.94
  4. Step 4: Simplify right side
    21,608.94x = 348,091,156.33
  5. Step 5: Solve for x
    x = 348,091,156.33/21,608.94
  6. Step 6: Final answer
    x = 16,108.66

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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.