Home / 13,121.97-18,104.00-7,816.07

Finding the Fourth Proportional to 13,121.97, 18,104.00 and 7,816.07

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Solution

The fourth proportional to 13,121.97, 18,104.00 and 7,816.07 is: 10,783.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.97 : 18,104.00 = 7,816.07 : x
  2. Step 2: Convert to fraction form
    13,121.97/18,104.00 = 7,816.07/x
  3. Step 3: Cross multiply
    13,121.97x = 18,104.00 × 7,816.07
  4. Step 4: Simplify right side
    13,121.97x = 141,502,001.68
  5. Step 5: Solve for x
    x = 141,502,001.68/13,121.97
  6. Step 6: Final answer
    x = 10,783.59

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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.