Home / 20,010.78-30,015.75-5,219.37

Finding the Fourth Proportional to 20,010.78, 30,015.75 and 5,219.37

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Solution

The fourth proportional to 20,010.78, 30,015.75 and 5,219.37 is: 7,828.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,010.78 : 30,015.75 = 5,219.37 : x
  2. Step 2: Convert to fraction form
    20,010.78/30,015.75 = 5,219.37/x
  3. Step 3: Cross multiply
    20,010.78x = 30,015.75 × 5,219.37
  4. Step 4: Simplify right side
    20,010.78x = 156,663,305.08
  5. Step 5: Solve for x
    x = 156,663,305.08/20,010.78
  6. Step 6: Final answer
    x = 7,828.95

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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.