Home / 39,964.80-55,152.76-21,816.60

Finding the Fourth Proportional to 39,964.80, 55,152.76 and 21,816.60

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Solution

The fourth proportional to 39,964.80, 55,152.76 and 21,816.60 is: 30,107.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,964.80 : 55,152.76 = 21,816.60 : x
  2. Step 2: Convert to fraction form
    39,964.80/55,152.76 = 21,816.60/x
  3. Step 3: Cross multiply
    39,964.80x = 55,152.76 × 21,816.60
  4. Step 4: Simplify right side
    39,964.80x = 1,203,245,703.82
  5. Step 5: Solve for x
    x = 1,203,245,703.82/39,964.80
  6. Step 6: Final answer
    x = 30,107.64

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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.