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Finding the Fourth Proportional to 15,883.95, 21,922.68 and 9,168.65

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Solution

The fourth proportional to 15,883.95, 21,922.68 and 9,168.65 is: 12,654.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,883.95 : 21,922.68 = 9,168.65 : x
  2. Step 2: Convert to fraction form
    15,883.95/21,922.68 = 9,168.65/x
  3. Step 3: Cross multiply
    15,883.95x = 21,922.68 × 9,168.65
  4. Step 4: Simplify right side
    15,883.95x = 201,001,379.98
  5. Step 5: Solve for x
    x = 201,001,379.98/15,883.95
  6. Step 6: Final answer
    x = 12,654.37

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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.