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Finding the Fourth Proportional to 19,133.64, 28,668 and 11,722.62

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Solution

The fourth proportional to 19,133.64, 28,668 and 11,722.62 is: 17,564.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,133.64 : 28,668 = 11,722.62 : x
  2. Step 2: Convert to fraction form
    19,133.64/28,668 = 11,722.62/x
  3. Step 3: Cross multiply
    19,133.64x = 28,668 × 11,722.62
  4. Step 4: Simplify right side
    19,133.64x = 336,064,070.16
  5. Step 5: Solve for x
    x = 336,064,070.16/19,133.64
  6. Step 6: Final answer
    x = 17,564.04

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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.