Home / 42,912.75-64,384.25-19,218.36

Finding the Fourth Proportional to 42,912.75, 64,384.25 and 19,218.36

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Solution

The fourth proportional to 42,912.75, 64,384.25 and 19,218.36 is: 28,834.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,912.75 : 64,384.25 = 19,218.36 : x
  2. Step 2: Convert to fraction form
    42,912.75/64,384.25 = 19,218.36/x
  3. Step 3: Cross multiply
    42,912.75x = 64,384.25 × 19,218.36
  4. Step 4: Simplify right side
    42,912.75x = 1,237,359,694.83
  5. Step 5: Solve for x
    x = 1,237,359,694.83/42,912.75
  6. Step 6: Final answer
    x = 28,834.31

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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.