Home / 39,903.84-55,067.40-21,998.88

Finding the Fourth Proportional to 39,903.84, 55,067.40 and 21,998.88

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Solution

The fourth proportional to 39,903.84, 55,067.40 and 21,998.88 is: 30,358.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,903.84 : 55,067.40 = 21,998.88 : x
  2. Step 2: Convert to fraction form
    39,903.84/55,067.40 = 21,998.88/x
  3. Step 3: Cross multiply
    39,903.84x = 55,067.40 × 21,998.88
  4. Step 4: Simplify right side
    39,903.84x = 1,211,421,124.51
  5. Step 5: Solve for x
    x = 1,211,421,124.51/39,903.84
  6. Step 6: Final answer
    x = 30,358.51

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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.