Home / 20,218.80-30,328.20-15,261.60

Finding the Fourth Proportional to 20,218.80, 30,328.20 and 15,261.60

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Solution

The fourth proportional to 20,218.80, 30,328.20 and 15,261.60 is: 22,892.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,218.80 : 30,328.20 = 15,261.60 : x
  2. Step 2: Convert to fraction form
    20,218.80/30,328.20 = 15,261.60/x
  3. Step 3: Cross multiply
    20,218.80x = 30,328.20 × 15,261.60
  4. Step 4: Simplify right side
    20,218.80x = 462,856,857.12
  5. Step 5: Solve for x
    x = 462,856,857.12/20,218.80
  6. Step 6: Final answer
    x = 22,892.40

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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.