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Finding the Fourth Proportional to 18,928.16, 28,372.16 and 9,046.56

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Solution

The fourth proportional to 18,928.16, 28,372.16 and 9,046.56 is: 13,560.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,928.16 : 28,372.16 = 9,046.56 : x
  2. Step 2: Convert to fraction form
    18,928.16/28,372.16 = 9,046.56/x
  3. Step 3: Cross multiply
    18,928.16x = 28,372.16 × 9,046.56
  4. Step 4: Simplify right side
    18,928.16x = 256,670,447.77
  5. Step 5: Solve for x
    x = 256,670,447.77/18,928.16
  6. Step 6: Final answer
    x = 13,560.24

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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.