Home / 39,890.05-55,048.39-21,984.64

Finding the Fourth Proportional to 39,890.05, 55,048.39 and 21,984.64

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Solution

The fourth proportional to 39,890.05, 55,048.39 and 21,984.64 is: 30,338.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,890.05 : 55,048.39 = 21,984.64 : x
  2. Step 2: Convert to fraction form
    39,890.05/55,048.39 = 21,984.64/x
  3. Step 3: Cross multiply
    39,890.05x = 55,048.39 × 21,984.64
  4. Step 4: Simplify right side
    39,890.05x = 1,210,218,844.15
  5. Step 5: Solve for x
    x = 1,210,218,844.15/39,890.05
  6. Step 6: Final answer
    x = 30,338.87

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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.