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Finding the Fourth Proportional to 28,961.84, 39,958.04 and 16,213.14

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Solution

The fourth proportional to 28,961.84, 39,958.04 and 16,213.14 is: 22,368.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,961.84 : 39,958.04 = 16,213.14 : x
  2. Step 2: Convert to fraction form
    28,961.84/39,958.04 = 16,213.14/x
  3. Step 3: Cross multiply
    28,961.84x = 39,958.04 × 16,213.14
  4. Step 4: Simplify right side
    28,961.84x = 647,845,215.58
  5. Step 5: Solve for x
    x = 647,845,215.58/28,961.84
  6. Step 6: Final answer
    x = 22,368.93

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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.