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Finding the Fourth Proportional to 13,617.72, 18,808.20 and 8,922.96

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Solution

The fourth proportional to 13,617.72, 18,808.20 and 8,922.96 is: 12,324.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,617.72 : 18,808.20 = 8,922.96 : x
  2. Step 2: Convert to fraction form
    13,617.72/18,808.20 = 8,922.96/x
  3. Step 3: Cross multiply
    13,617.72x = 18,808.20 × 8,922.96
  4. Step 4: Simplify right side
    13,617.72x = 167,824,816.27
  5. Step 5: Solve for x
    x = 167,824,816.27/13,617.72
  6. Step 6: Final answer
    x = 12,324.00

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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.