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Finding the Fourth Proportional to 13,312, 19,956.72 and 8,916

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Solution

The fourth proportional to 13,312, 19,956.72 and 8,916 is: 13,366.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,312 : 19,956.72 = 8,916 : x
  2. Step 2: Convert to fraction form
    13,312/19,956.72 = 8,916/x
  3. Step 3: Cross multiply
    13,312x = 19,956.72 × 8,916
  4. Step 4: Simplify right side
    13,312x = 177,934,115.52
  5. Step 5: Solve for x
    x = 177,934,115.52/13,312
  6. Step 6: Final answer
    x = 13,366.44

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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.