Home / 39,891.46-55,047.74-21,986.61

Finding the Fourth Proportional to 39,891.46, 55,047.74 and 21,986.61

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Solution

The fourth proportional to 39,891.46, 55,047.74 and 21,986.61 is: 30,340.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,891.46 : 55,047.74 = 21,986.61 : x
  2. Step 2: Convert to fraction form
    39,891.46/55,047.74 = 21,986.61/x
  3. Step 3: Cross multiply
    39,891.46x = 55,047.74 × 21,986.61
  4. Step 4: Simplify right side
    39,891.46x = 1,210,313,080.83
  5. Step 5: Solve for x
    x = 1,210,313,080.83/39,891.46
  6. Step 6: Final answer
    x = 30,340.16

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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.