Home / 20,015.78-30,042.49-10,162.13

Finding the Fourth Proportional to 20,015.78, 30,042.49 and 10,162.13

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Solution

The fourth proportional to 20,015.78, 30,042.49 and 10,162.13 is: 15,252.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,015.78 : 30,042.49 = 10,162.13 : x
  2. Step 2: Convert to fraction form
    20,015.78/30,042.49 = 10,162.13/x
  3. Step 3: Cross multiply
    20,015.78x = 30,042.49 × 10,162.13
  4. Step 4: Simplify right side
    20,015.78x = 305,295,688.90
  5. Step 5: Solve for x
    x = 305,295,688.90/20,015.78
  6. Step 6: Final answer
    x = 15,252.75

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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.