Home / 13,191.64-18,196.86-8,215

Finding the Fourth Proportional to 13,191.64, 18,196.86 and 8,215

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Solution

The fourth proportional to 13,191.64, 18,196.86 and 8,215 is: 11,331.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,191.64 : 18,196.86 = 8,215 : x
  2. Step 2: Convert to fraction form
    13,191.64/18,196.86 = 8,215/x
  3. Step 3: Cross multiply
    13,191.64x = 18,196.86 × 8,215
  4. Step 4: Simplify right side
    13,191.64x = 149,487,204.90
  5. Step 5: Solve for x
    x = 149,487,204.90/13,191.64
  6. Step 6: Final answer
    x = 11,331.97

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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.