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Finding the Fourth Proportional to 28,768.32, 43,154.82 and 7,991.82

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Solution

The fourth proportional to 28,768.32, 43,154.82 and 7,991.82 is: 11,988.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,768.32 : 43,154.82 = 7,991.82 : x
  2. Step 2: Convert to fraction form
    28,768.32/43,154.82 = 7,991.82/x
  3. Step 3: Cross multiply
    28,768.32x = 43,154.82 × 7,991.82
  4. Step 4: Simplify right side
    28,768.32x = 344,885,553.57
  5. Step 5: Solve for x
    x = 344,885,553.57/28,768.32
  6. Step 6: Final answer
    x = 11,988.38

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1.5x scale

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.