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Finding the Fourth Proportional to 8,918.44, 12,304.62 and 5,191.72

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Solution

The fourth proportional to 8,918.44, 12,304.62 and 5,191.72 is: 7,162.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.44 : 12,304.62 = 5,191.72 : x
  2. Step 2: Convert to fraction form
    8,918.44/12,304.62 = 5,191.72/x
  3. Step 3: Cross multiply
    8,918.44x = 12,304.62 × 5,191.72
  4. Step 4: Simplify right side
    8,918.44x = 63,882,141.75
  5. Step 5: Solve for x
    x = 63,882,141.75/8,918.44
  6. Step 6: Final answer
    x = 7,162.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.