Home / 13,185.13-18,194.78-7,215.65

Finding the Fourth Proportional to 13,185.13, 18,194.78 and 7,215.65

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Solution

The fourth proportional to 13,185.13, 18,194.78 and 7,215.65 is: 9,957.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,185.13 : 18,194.78 = 7,215.65 : x
  2. Step 2: Convert to fraction form
    13,185.13/18,194.78 = 7,215.65/x
  3. Step 3: Cross multiply
    13,185.13x = 18,194.78 × 7,215.65
  4. Step 4: Simplify right side
    13,185.13x = 131,287,057.55
  5. Step 5: Solve for x
    x = 131,287,057.55/13,185.13
  6. Step 6: Final answer
    x = 9,957.21

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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.