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Finding the Fourth Proportional to 18,962.91, 28,461.81 and 9,609.44

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Solution

The fourth proportional to 18,962.91, 28,461.81 and 9,609.44 is: 14,422.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,962.91 : 28,461.81 = 9,609.44 : x
  2. Step 2: Convert to fraction form
    18,962.91/28,461.81 = 9,609.44/x
  3. Step 3: Cross multiply
    18,962.91x = 28,461.81 × 9,609.44
  4. Step 4: Simplify right side
    18,962.91x = 273,501,949.21
  5. Step 5: Solve for x
    x = 273,501,949.21/18,962.91
  6. Step 6: Final answer
    x = 14,422.99

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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.