Home / 13,638.30-18,811.62-8,326.32

Finding the Fourth Proportional to 13,638.30, 18,811.62 and 8,326.32

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Solution

The fourth proportional to 13,638.30, 18,811.62 and 8,326.32 is: 11,484.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.30 : 18,811.62 = 8,326.32 : x
  2. Step 2: Convert to fraction form
    13,638.30/18,811.62 = 8,326.32/x
  3. Step 3: Cross multiply
    13,638.30x = 18,811.62 × 8,326.32
  4. Step 4: Simplify right side
    13,638.30x = 156,631,567.84
  5. Step 5: Solve for x
    x = 156,631,567.84/13,638.30
  6. Step 6: Final answer
    x = 11,484.68

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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.