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Finding the Fourth Proportional to 18,439.40, 27,659.91 and 5,959.40

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Solution

The fourth proportional to 18,439.40, 27,659.91 and 5,959.40 is: 8,939.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,439.40 : 27,659.91 = 5,959.40 : x
  2. Step 2: Convert to fraction form
    18,439.40/27,659.91 = 5,959.40/x
  3. Step 3: Cross multiply
    18,439.40x = 27,659.91 × 5,959.40
  4. Step 4: Simplify right side
    18,439.40x = 164,836,329.35
  5. Step 5: Solve for x
    x = 164,836,329.35/18,439.40
  6. Step 6: Final answer
    x = 8,939.36

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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.