Home / 20,172.74-27,838.15-11,221.02

Finding the Fourth Proportional to 20,172.74, 27,838.15 and 11,221.02

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Solution

The fourth proportional to 20,172.74, 27,838.15 and 11,221.02 is: 15,484.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,172.74 : 27,838.15 = 11,221.02 : x
  2. Step 2: Convert to fraction form
    20,172.74/27,838.15 = 11,221.02/x
  3. Step 3: Cross multiply
    20,172.74x = 27,838.15 × 11,221.02
  4. Step 4: Simplify right side
    20,172.74x = 312,372,409.86
  5. Step 5: Solve for x
    x = 312,372,409.86/20,172.74
  6. Step 6: Final answer
    x = 15,484.88

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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.