Home / 20,147.20-30,195.60-10,290.40

Finding the Fourth Proportional to 20,147.20, 30,195.60 and 10,290.40

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Solution

The fourth proportional to 20,147.20, 30,195.60 and 10,290.40 is: 15,422.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,147.20 : 30,195.60 = 10,290.40 : x
  2. Step 2: Convert to fraction form
    20,147.20/30,195.60 = 10,290.40/x
  3. Step 3: Cross multiply
    20,147.20x = 30,195.60 × 10,290.40
  4. Step 4: Simplify right side
    20,147.20x = 310,724,802.24
  5. Step 5: Solve for x
    x = 310,724,802.24/20,147.20
  6. Step 6: Final answer
    x = 15,422.73

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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.