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Finding the Fourth Proportional to 20,254.60, 30,381.90 and 18,310.60

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Solution

The fourth proportional to 20,254.60, 30,381.90 and 18,310.60 is: 27,465.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,254.60 : 30,381.90 = 18,310.60 : x
  2. Step 2: Convert to fraction form
    20,254.60/30,381.90 = 18,310.60/x
  3. Step 3: Cross multiply
    20,254.60x = 30,381.90 × 18,310.60
  4. Step 4: Simplify right side
    20,254.60x = 556,310,818.14
  5. Step 5: Solve for x
    x = 556,310,818.14/20,254.60
  6. Step 6: Final answer
    x = 27,465.90

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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.