Home / 39,878.82-55,032.80-21,973.68

Finding the Fourth Proportional to 39,878.82, 55,032.80 and 21,973.68

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Solution

The fourth proportional to 39,878.82, 55,032.80 and 21,973.68 is: 30,323.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,878.82 : 55,032.80 = 21,973.68 : x
  2. Step 2: Convert to fraction form
    39,878.82/55,032.80 = 21,973.68/x
  3. Step 3: Cross multiply
    39,878.82x = 55,032.80 × 21,973.68
  4. Step 4: Simplify right side
    39,878.82x = 1,209,273,026.84
  5. Step 5: Solve for x
    x = 1,209,273,026.84/39,878.82
  6. Step 6: Final answer
    x = 30,323.69

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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.