Home / 20,172.58-27,838.22-11,220.19

Finding the Fourth Proportional to 20,172.58, 27,838.22 and 11,220.19

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Solution

The fourth proportional to 20,172.58, 27,838.22 and 11,220.19 is: 15,483.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,172.58 : 27,838.22 = 11,220.19 : x
  2. Step 2: Convert to fraction form
    20,172.58/27,838.22 = 11,220.19/x
  3. Step 3: Cross multiply
    20,172.58x = 27,838.22 × 11,220.19
  4. Step 4: Simplify right side
    20,172.58x = 312,349,991.97
  5. Step 5: Solve for x
    x = 312,349,991.97/20,172.58
  6. Step 6: Final answer
    x = 15,483.89

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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.