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Finding the Fourth Proportional to 13,485.84, 18,613.44 and 8,761.92

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Solution

The fourth proportional to 13,485.84, 18,613.44 and 8,761.92 is: 12,093.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,485.84 : 18,613.44 = 8,761.92 : x
  2. Step 2: Convert to fraction form
    13,485.84/18,613.44 = 8,761.92/x
  3. Step 3: Cross multiply
    13,485.84x = 18,613.44 × 8,761.92
  4. Step 4: Simplify right side
    13,485.84x = 163,089,472.20
  5. Step 5: Solve for x
    x = 163,089,472.20/13,485.84
  6. Step 6: Final answer
    x = 12,093.39

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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.