Home / 13,221.23-18,244.68-7,918.97

Finding the Fourth Proportional to 13,221.23, 18,244.68 and 7,918.97

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Solution

The fourth proportional to 13,221.23, 18,244.68 and 7,918.97 is: 10,927.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.23 : 18,244.68 = 7,918.97 : x
  2. Step 2: Convert to fraction form
    13,221.23/18,244.68 = 7,918.97/x
  3. Step 3: Cross multiply
    13,221.23x = 18,244.68 × 7,918.97
  4. Step 4: Simplify right side
    13,221.23x = 144,478,982.36
  5. Step 5: Solve for x
    x = 144,478,982.36/13,221.23
  6. Step 6: Final answer
    x = 10,927.81

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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.