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Finding the Fourth Proportional to 28,928.66, 43,381.13 and 9,201.92

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Solution

The fourth proportional to 28,928.66, 43,381.13 and 9,201.92 is: 13,799.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,928.66 : 43,381.13 = 9,201.92 : x
  2. Step 2: Convert to fraction form
    28,928.66/43,381.13 = 9,201.92/x
  3. Step 3: Cross multiply
    28,928.66x = 43,381.13 × 9,201.92
  4. Step 4: Simplify right side
    28,928.66x = 399,189,424.85
  5. Step 5: Solve for x
    x = 399,189,424.85/28,928.66
  6. Step 6: Final answer
    x = 13,799.10

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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.