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Finding the Fourth Proportional to 19,307.27, 28,961.19 and 7,620.38

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Solution

The fourth proportional to 19,307.27, 28,961.19 and 7,620.38 is: 11,430.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,307.27 : 28,961.19 = 7,620.38 : x
  2. Step 2: Convert to fraction form
    19,307.27/28,961.19 = 7,620.38/x
  3. Step 3: Cross multiply
    19,307.27x = 28,961.19 × 7,620.38
  4. Step 4: Simplify right side
    19,307.27x = 220,695,128.25
  5. Step 5: Solve for x
    x = 220,695,128.25/19,307.27
  6. Step 6: Final answer
    x = 11,430.68

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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.