Home / 20,126.27-30,201.69-12,720.53

Finding the Fourth Proportional to 20,126.27, 30,201.69 and 12,720.53

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Solution

The fourth proportional to 20,126.27, 30,201.69 and 12,720.53 is: 19,088.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,126.27 : 30,201.69 = 12,720.53 : x
  2. Step 2: Convert to fraction form
    20,126.27/30,201.69 = 12,720.53/x
  3. Step 3: Cross multiply
    20,126.27x = 30,201.69 × 12,720.53
  4. Step 4: Simplify right side
    20,126.27x = 384,181,503.70
  5. Step 5: Solve for x
    x = 384,181,503.70/20,126.27
  6. Step 6: Final answer
    x = 19,088.56

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1.5x scale

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.