Home / 20,555.20-30,847.20-13,177.60

Finding the Fourth Proportional to 20,555.20, 30,847.20 and 13,177.60

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Solution

The fourth proportional to 20,555.20, 30,847.20 and 13,177.60 is: 19,775.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,555.20 : 30,847.20 = 13,177.60 : x
  2. Step 2: Convert to fraction form
    20,555.20/30,847.20 = 13,177.60/x
  3. Step 3: Cross multiply
    20,555.20x = 30,847.20 × 13,177.60
  4. Step 4: Simplify right side
    20,555.20x = 406,492,062.72
  5. Step 5: Solve for x
    x = 406,492,062.72/20,555.20
  6. Step 6: Final answer
    x = 19,775.63

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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.