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Finding the Fourth Proportional to 19,208.78, 28,814.09 and 9,336.30

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Solution

The fourth proportional to 19,208.78, 28,814.09 and 9,336.30 is: 14,004.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,208.78 : 28,814.09 = 9,336.30 : x
  2. Step 2: Convert to fraction form
    19,208.78/28,814.09 = 9,336.30/x
  3. Step 3: Cross multiply
    19,208.78x = 28,814.09 × 9,336.30
  4. Step 4: Simplify right side
    19,208.78x = 269,016,988.47
  5. Step 5: Solve for x
    x = 269,016,988.47/19,208.78
  6. Step 6: Final answer
    x = 14,004.90

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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.