Home / 20,439.88-28,201.22-11,486.44

Finding the Fourth Proportional to 20,439.88, 28,201.22 and 11,486.44

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Solution

The fourth proportional to 20,439.88, 28,201.22 and 11,486.44 is: 15,848.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.88 : 28,201.22 = 11,486.44 : x
  2. Step 2: Convert to fraction form
    20,439.88/28,201.22 = 11,486.44/x
  3. Step 3: Cross multiply
    20,439.88x = 28,201.22 × 11,486.44
  4. Step 4: Simplify right side
    20,439.88x = 323,931,621.46
  5. Step 5: Solve for x
    x = 323,931,621.46/20,439.88
  6. Step 6: Final answer
    x = 15,848.02

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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.