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Finding the Fourth Proportional to 18,805.71, 28,211.81 and 6,326.94

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Solution

The fourth proportional to 18,805.71, 28,211.81 and 6,326.94 is: 9,491.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,805.71 : 28,211.81 = 6,326.94 : x
  2. Step 2: Convert to fraction form
    18,805.71/28,211.81 = 6,326.94/x
  3. Step 3: Cross multiply
    18,805.71x = 28,211.81 × 6,326.94
  4. Step 4: Simplify right side
    18,805.71x = 178,494,429.16
  5. Step 5: Solve for x
    x = 178,494,429.16/18,805.71
  6. Step 6: Final answer
    x = 9,491.50

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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.