Home / 21,871.44-30,170.52-15,161.04

Finding the Fourth Proportional to 21,871.44, 30,170.52 and 15,161.04

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Solution

The fourth proportional to 21,871.44, 30,170.52 and 15,161.04 is: 20,913.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,871.44 : 30,170.52 = 15,161.04 : x
  2. Step 2: Convert to fraction form
    21,871.44/30,170.52 = 15,161.04/x
  3. Step 3: Cross multiply
    21,871.44x = 30,170.52 × 15,161.04
  4. Step 4: Simplify right side
    21,871.44x = 457,416,460.54
  5. Step 5: Solve for x
    x = 457,416,460.54/21,871.44
  6. Step 6: Final answer
    x = 20,913.87

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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.