Home / 20,412.40-30,618.60-7,279.60

Finding the Fourth Proportional to 20,412.40, 30,618.60 and 7,279.60

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Solution

The fourth proportional to 20,412.40, 30,618.60 and 7,279.60 is: 10,919.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.40 : 30,618.60 = 7,279.60 : x
  2. Step 2: Convert to fraction form
    20,412.40/30,618.60 = 7,279.60/x
  3. Step 3: Cross multiply
    20,412.40x = 30,618.60 × 7,279.60
  4. Step 4: Simplify right side
    20,412.40x = 222,891,160.56
  5. Step 5: Solve for x
    x = 222,891,160.56/20,412.40
  6. Step 6: Final answer
    x = 10,919.40

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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.