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Finding the Fourth Proportional to 15,883.67, 21,922.09 and 8,812.37

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Solution

The fourth proportional to 15,883.67, 21,922.09 and 8,812.37 is: 12,162.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,883.67 : 21,922.09 = 8,812.37 : x
  2. Step 2: Convert to fraction form
    15,883.67/21,922.09 = 8,812.37/x
  3. Step 3: Cross multiply
    15,883.67x = 21,922.09 × 8,812.37
  4. Step 4: Simplify right side
    15,883.67x = 193,185,477.72
  5. Step 5: Solve for x
    x = 193,185,477.72/15,883.67
  6. Step 6: Final answer
    x = 12,162.52

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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.