Home / 13,239.80-18,270.99-7,190.06

Finding the Fourth Proportional to 13,239.80, 18,270.99 and 7,190.06

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Solution

The fourth proportional to 13,239.80, 18,270.99 and 7,190.06 is: 9,922.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,239.80 : 18,270.99 = 7,190.06 : x
  2. Step 2: Convert to fraction form
    13,239.80/18,270.99 = 7,190.06/x
  3. Step 3: Cross multiply
    13,239.80x = 18,270.99 × 7,190.06
  4. Step 4: Simplify right side
    13,239.80x = 131,369,514.36
  5. Step 5: Solve for x
    x = 131,369,514.36/13,239.80
  6. Step 6: Final answer
    x = 9,922.32

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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.