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Finding the Fourth Proportional to 20,186.20, 30,468.90 and 20,186.20

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Solution

The fourth proportional to 20,186.20, 30,468.90 and 20,186.20 is: 30,468.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,186.20 : 30,468.90 = 20,186.20 : x
  2. Step 2: Convert to fraction form
    20,186.20/30,468.90 = 20,186.20/x
  3. Step 3: Cross multiply
    20,186.20x = 30,468.90 × 20,186.20
  4. Step 4: Simplify right side
    20,186.20x = 615,051,308.71
  5. Step 5: Solve for x
    x = 615,051,308.71/20,186.20
  6. Step 6: Final answer
    x = 30,468.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.