Home / 20,130.75-30,196.53-6,279.75

Finding the Fourth Proportional to 20,130.75, 30,196.53 and 6,279.75

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Solution

The fourth proportional to 20,130.75, 30,196.53 and 6,279.75 is: 9,419.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.75 : 30,196.53 = 6,279.75 : x
  2. Step 2: Convert to fraction form
    20,130.75/30,196.53 = 6,279.75/x
  3. Step 3: Cross multiply
    20,130.75x = 30,196.53 × 6,279.75
  4. Step 4: Simplify right side
    20,130.75x = 189,626,659.27
  5. Step 5: Solve for x
    x = 189,626,659.27/20,130.75
  6. Step 6: Final answer
    x = 9,419.75

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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.