Home / 39,860.51-55,005.48-21,955.12

Finding the Fourth Proportional to 39,860.51, 55,005.48 and 21,955.12

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Solution

The fourth proportional to 39,860.51, 55,005.48 and 21,955.12 is: 30,296.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,860.51 : 55,005.48 = 21,955.12 : x
  2. Step 2: Convert to fraction form
    39,860.51/55,005.48 = 21,955.12/x
  3. Step 3: Cross multiply
    39,860.51x = 55,005.48 × 21,955.12
  4. Step 4: Simplify right side
    39,860.51x = 1,207,651,776.54
  5. Step 5: Solve for x
    x = 1,207,651,776.54/39,860.51
  6. Step 6: Final answer
    x = 30,296.95

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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.