Home / 42,912.47-64,357.94-20,409.27

Finding the Fourth Proportional to 42,912.47, 64,357.94 and 20,409.27

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Solution

The fourth proportional to 42,912.47, 64,357.94 and 20,409.27 is: 30,608.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,912.47 : 64,357.94 = 20,409.27 : x
  2. Step 2: Convert to fraction form
    42,912.47/64,357.94 = 20,409.27/x
  3. Step 3: Cross multiply
    42,912.47x = 64,357.94 × 20,409.27
  4. Step 4: Simplify right side
    42,912.47x = 1,313,498,201.29
  5. Step 5: Solve for x
    x = 1,313,498,201.29/42,912.47
  6. Step 6: Final answer
    x = 30,608.77

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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.