Home / 20,121.68-27,768.03-12,572.39

Finding the Fourth Proportional to 20,121.68, 27,768.03 and 12,572.39

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Solution

The fourth proportional to 20,121.68, 27,768.03 and 12,572.39 is: 17,349.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.68 : 27,768.03 = 12,572.39 : x
  2. Step 2: Convert to fraction form
    20,121.68/27,768.03 = 12,572.39/x
  3. Step 3: Cross multiply
    20,121.68x = 27,768.03 × 12,572.39
  4. Step 4: Simplify right side
    20,121.68x = 349,110,464.55
  5. Step 5: Solve for x
    x = 349,110,464.55/20,121.68
  6. Step 6: Final answer
    x = 17,349.96

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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.