Home / 20,139.52-30,181.68-15,205.12

Finding the Fourth Proportional to 20,139.52, 30,181.68 and 15,205.12

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Solution

The fourth proportional to 20,139.52, 30,181.68 and 15,205.12 is: 22,786.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.52 : 30,181.68 = 15,205.12 : x
  2. Step 2: Convert to fraction form
    20,139.52/30,181.68 = 15,205.12/x
  3. Step 3: Cross multiply
    20,139.52x = 30,181.68 × 15,205.12
  4. Step 4: Simplify right side
    20,139.52x = 458,916,066.20
  5. Step 5: Solve for x
    x = 458,916,066.20/20,139.52
  6. Step 6: Final answer
    x = 22,786.84

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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.