Home / 13,157.80-18,169.89-8,450.28

Finding the Fourth Proportional to 13,157.80, 18,169.89 and 8,450.28

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Solution

The fourth proportional to 13,157.80, 18,169.89 and 8,450.28 is: 11,669.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,157.80 : 18,169.89 = 8,450.28 : x
  2. Step 2: Convert to fraction form
    13,157.80/18,169.89 = 8,450.28/x
  3. Step 3: Cross multiply
    13,157.80x = 18,169.89 × 8,450.28
  4. Step 4: Simplify right side
    13,157.80x = 153,540,626.38
  5. Step 5: Solve for x
    x = 153,540,626.38/13,157.80
  6. Step 6: Final answer
    x = 11,669.17

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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.