Home / 13,520.34-18,659.43-8,215.62

Finding the Fourth Proportional to 13,520.34, 18,659.43 and 8,215.62

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Solution

The fourth proportional to 13,520.34, 18,659.43 and 8,215.62 is: 11,338.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.34 : 18,659.43 = 8,215.62 : x
  2. Step 2: Convert to fraction form
    13,520.34/18,659.43 = 8,215.62/x
  3. Step 3: Cross multiply
    13,520.34x = 18,659.43 × 8,215.62
  4. Step 4: Simplify right side
    13,520.34x = 153,298,786.30
  5. Step 5: Solve for x
    x = 153,298,786.30/13,520.34
  6. Step 6: Final answer
    x = 11,338.38

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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.