Home / 20,286.83-28,031.60-15,611.51

Finding the Fourth Proportional to 20,286.83, 28,031.60 and 15,611.51

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Solution

The fourth proportional to 20,286.83, 28,031.60 and 15,611.51 is: 21,571.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,286.83 : 28,031.60 = 15,611.51 : x
  2. Step 2: Convert to fraction form
    20,286.83/28,031.60 = 15,611.51/x
  3. Step 3: Cross multiply
    20,286.83x = 28,031.60 × 15,611.51
  4. Step 4: Simplify right side
    20,286.83x = 437,615,603.72
  5. Step 5: Solve for x
    x = 437,615,603.72/20,286.83
  6. Step 6: Final answer
    x = 21,571.41

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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.