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Finding the Fourth Proportional to 15,571.62, 21,489.43 and 8,857.87

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Solution

The fourth proportional to 15,571.62, 21,489.43 and 8,857.87 is: 12,224.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,571.62 : 21,489.43 = 8,857.87 : x
  2. Step 2: Convert to fraction form
    15,571.62/21,489.43 = 8,857.87/x
  3. Step 3: Cross multiply
    15,571.62x = 21,489.43 × 8,857.87
  4. Step 4: Simplify right side
    15,571.62x = 190,350,577.31
  5. Step 5: Solve for x
    x = 190,350,577.31/15,571.62
  6. Step 6: Final answer
    x = 12,224.20

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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.