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Finding the Fourth Proportional to 8,972.33, 12,381.80 and 4,993.79

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Solution

The fourth proportional to 8,972.33, 12,381.80 and 4,993.79 is: 6,891.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,972.33 : 12,381.80 = 4,993.79 : x
  2. Step 2: Convert to fraction form
    8,972.33/12,381.80 = 4,993.79/x
  3. Step 3: Cross multiply
    8,972.33x = 12,381.80 × 4,993.79
  4. Step 4: Simplify right side
    8,972.33x = 61,832,022.14
  5. Step 5: Solve for x
    x = 61,832,022.14/8,972.33
  6. Step 6: Final answer
    x = 6,891.42

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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.