Home / 18,991.36-28,481.55-7,301.80

Finding the Fourth Proportional to 18,991.36, 28,481.55 and 7,301.80

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Solution

The fourth proportional to 18,991.36, 28,481.55 and 7,301.80 is: 10,950.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.36 : 28,481.55 = 7,301.80 : x
  2. Step 2: Convert to fraction form
    18,991.36/28,481.55 = 7,301.80/x
  3. Step 3: Cross multiply
    18,991.36x = 28,481.55 × 7,301.80
  4. Step 4: Simplify right side
    18,991.36x = 207,966,581.79
  5. Step 5: Solve for x
    x = 207,966,581.79/18,991.36
  6. Step 6: Final answer
    x = 10,950.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.