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Finding the Fourth Proportional to 18,795.84, 28,188.72 and 5,645.28

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Solution

The fourth proportional to 18,795.84, 28,188.72 and 5,645.28 is: 8,466.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,795.84 : 28,188.72 = 5,645.28 : x
  2. Step 2: Convert to fraction form
    18,795.84/28,188.72 = 5,645.28/x
  3. Step 3: Cross multiply
    18,795.84x = 28,188.72 × 5,645.28
  4. Step 4: Simplify right side
    18,795.84x = 159,133,217.24
  5. Step 5: Solve for x
    x = 159,133,217.24/18,795.84
  6. Step 6: Final answer
    x = 8,466.41

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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.