Home / 20,097.15-30,139.68-12,612.06

Finding the Fourth Proportional to 20,097.15, 30,139.68 and 12,612.06

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Solution

The fourth proportional to 20,097.15, 30,139.68 and 12,612.06 is: 18,914.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,097.15 : 30,139.68 = 12,612.06 : x
  2. Step 2: Convert to fraction form
    20,097.15/30,139.68 = 12,612.06/x
  3. Step 3: Cross multiply
    20,097.15x = 30,139.68 × 12,612.06
  4. Step 4: Simplify right side
    20,097.15x = 380,123,452.54
  5. Step 5: Solve for x
    x = 380,123,452.54/20,097.15
  6. Step 6: Final answer
    x = 18,914.30

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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.