Home / 13,192.49-18,205.67-7,142.79

Finding the Fourth Proportional to 13,192.49, 18,205.67 and 7,142.79

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Solution

The fourth proportional to 13,192.49, 18,205.67 and 7,142.79 is: 9,857.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,192.49 : 18,205.67 = 7,142.79 : x
  2. Step 2: Convert to fraction form
    13,192.49/18,205.67 = 7,142.79/x
  3. Step 3: Cross multiply
    13,192.49x = 18,205.67 × 7,142.79
  4. Step 4: Simplify right side
    13,192.49x = 130,039,277.62
  5. Step 5: Solve for x
    x = 130,039,277.62/13,192.49
  6. Step 6: Final answer
    x = 9,857.07

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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.