Home / 39,894.13-55,057.19-21,992.64

Finding the Fourth Proportional to 39,894.13, 55,057.19 and 21,992.64

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Solution

The fourth proportional to 39,894.13, 55,057.19 and 21,992.64 is: 30,351.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,894.13 : 55,057.19 = 21,992.64 : x
  2. Step 2: Convert to fraction form
    39,894.13/55,057.19 = 21,992.64/x
  3. Step 3: Cross multiply
    39,894.13x = 55,057.19 × 21,992.64
  4. Step 4: Simplify right side
    39,894.13x = 1,210,852,959.08
  5. Step 5: Solve for x
    x = 1,210,852,959.08/39,894.13
  6. Step 6: Final answer
    x = 30,351.66

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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.