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Finding the Fourth Proportional to 11,835.28, 17,678.42 and 8,687.44

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Solution

The fourth proportional to 11,835.28, 17,678.42 and 8,687.44 is: 12,976.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,835.28 : 17,678.42 = 8,687.44 : x
  2. Step 2: Convert to fraction form
    11,835.28/17,678.42 = 8,687.44/x
  3. Step 3: Cross multiply
    11,835.28x = 17,678.42 × 8,687.44
  4. Step 4: Simplify right side
    11,835.28x = 153,580,213.04
  5. Step 5: Solve for x
    x = 153,580,213.04/11,835.28
  6. Step 6: Final answer
    x = 12,976.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.