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Finding the Fourth Proportional to 15,883.27, 21,918.12 and 8,809.54

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Solution

The fourth proportional to 15,883.27, 21,918.12 and 8,809.54 is: 12,156.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,883.27 : 21,918.12 = 8,809.54 : x
  2. Step 2: Convert to fraction form
    15,883.27/21,918.12 = 8,809.54/x
  3. Step 3: Cross multiply
    15,883.27x = 21,918.12 × 8,809.54
  4. Step 4: Simplify right side
    15,883.27x = 193,088,554.86
  5. Step 5: Solve for x
    x = 193,088,554.86/15,883.27
  6. Step 6: Final answer
    x = 12,156.73

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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.