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Finding the Fourth Proportional to 15,662.16, 21,614.19 and 8,855.63

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Solution

The fourth proportional to 15,662.16, 21,614.19 and 8,855.63 is: 12,221.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,662.16 : 21,614.19 = 8,855.63 : x
  2. Step 2: Convert to fraction form
    15,662.16/21,614.19 = 8,855.63/x
  3. Step 3: Cross multiply
    15,662.16x = 21,614.19 × 8,855.63
  4. Step 4: Simplify right side
    15,662.16x = 191,407,380.56
  5. Step 5: Solve for x
    x = 191,407,380.56/15,662.16
  6. Step 6: Final answer
    x = 12,221.01

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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.