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Finding the Fourth Proportional to 28,617, 39,489.84 and 16,678.32

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Solution

The fourth proportional to 28,617, 39,489.84 and 16,678.32 is: 23,015.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,617 : 39,489.84 = 16,678.32 : x
  2. Step 2: Convert to fraction form
    28,617/39,489.84 = 16,678.32/x
  3. Step 3: Cross multiply
    28,617x = 39,489.84 × 16,678.32
  4. Step 4: Simplify right side
    28,617x = 658,624,188.27
  5. Step 5: Solve for x
    x = 658,624,188.27/28,617
  6. Step 6: Final answer
    x = 23,015.14

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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.