Home / 20,102.68-30,149.79-12,965.54

Finding the Fourth Proportional to 20,102.68, 30,149.79 and 12,965.54

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Solution

The fourth proportional to 20,102.68, 30,149.79 and 12,965.54 is: 19,445.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,102.68 : 30,149.79 = 12,965.54 : x
  2. Step 2: Convert to fraction form
    20,102.68/30,149.79 = 12,965.54/x
  3. Step 3: Cross multiply
    20,102.68x = 30,149.79 × 12,965.54
  4. Step 4: Simplify right side
    20,102.68x = 390,908,308.24
  5. Step 5: Solve for x
    x = 390,908,308.24/20,102.68
  6. Step 6: Final answer
    x = 19,445.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.