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Finding the Fourth Proportional to 18,390.82, 27,574.36 and 7,867.71

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Solution

The fourth proportional to 18,390.82, 27,574.36 and 7,867.71 is: 11,796.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.82 : 27,574.36 = 7,867.71 : x
  2. Step 2: Convert to fraction form
    18,390.82/27,574.36 = 7,867.71/x
  3. Step 3: Cross multiply
    18,390.82x = 27,574.36 × 7,867.71
  4. Step 4: Simplify right side
    18,390.82x = 216,946,959.59
  5. Step 5: Solve for x
    x = 216,946,959.59/18,390.82
  6. Step 6: Final answer
    x = 11,796.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.