Home / 39,878.52-55,028.42-21,972.92

Finding the Fourth Proportional to 39,878.52, 55,028.42 and 21,972.92

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Solution

The fourth proportional to 39,878.52, 55,028.42 and 21,972.92 is: 30,320.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,878.52 : 55,028.42 = 21,972.92 : x
  2. Step 2: Convert to fraction form
    39,878.52/55,028.42 = 21,972.92/x
  3. Step 3: Cross multiply
    39,878.52x = 55,028.42 × 21,972.92
  4. Step 4: Simplify right side
    39,878.52x = 1,209,135,070.39
  5. Step 5: Solve for x
    x = 1,209,135,070.39/39,878.52
  6. Step 6: Final answer
    x = 30,320.46

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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.