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Finding the Fourth Proportional to 28,908.64, 43,366.16 and 11,376.16

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Solution

The fourth proportional to 28,908.64, 43,366.16 and 11,376.16 is: 17,065.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,908.64 : 43,366.16 = 11,376.16 : x
  2. Step 2: Convert to fraction form
    28,908.64/43,366.16 = 11,376.16/x
  3. Step 3: Cross multiply
    28,908.64x = 43,366.16 × 11,376.16
  4. Step 4: Simplify right side
    28,908.64x = 493,340,374.75
  5. Step 5: Solve for x
    x = 493,340,374.75/28,908.64
  6. Step 6: Final answer
    x = 17,065.50

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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.