Home / 39,964.99-55,153.02-21,816.79

Finding the Fourth Proportional to 39,964.99, 55,153.02 and 21,816.79

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Solution

The fourth proportional to 39,964.99, 55,153.02 and 21,816.79 is: 30,107.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,964.99 : 55,153.02 = 21,816.79 : x
  2. Step 2: Convert to fraction form
    39,964.99/55,153.02 = 21,816.79/x
  3. Step 3: Cross multiply
    39,964.99x = 55,153.02 × 21,816.79
  4. Step 4: Simplify right side
    39,964.99x = 1,203,261,579.44
  5. Step 5: Solve for x
    x = 1,203,261,579.44/39,964.99
  6. Step 6: Final answer
    x = 30,107.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.