Home / 42,828-64,199.34-20,635.08

Finding the Fourth Proportional to 42,828, 64,199.34 and 20,635.08

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Solution

The fourth proportional to 42,828, 64,199.34 and 20,635.08 is: 30,932.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,828 : 64,199.34 = 20,635.08 : x
  2. Step 2: Convert to fraction form
    42,828/64,199.34 = 20,635.08/x
  3. Step 3: Cross multiply
    42,828x = 64,199.34 × 20,635.08
  4. Step 4: Simplify right side
    42,828x = 1,324,758,516.85
  5. Step 5: Solve for x
    x = 1,324,758,516.85/42,828
  6. Step 6: Final answer
    x = 30,932.07

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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.