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Finding the Fourth Proportional to 19,605.63, 29,391.91 and 8,503.96

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Solution

The fourth proportional to 19,605.63, 29,391.91 and 8,503.96 is: 12,748.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,605.63 : 29,391.91 = 8,503.96 : x
  2. Step 2: Convert to fraction form
    19,605.63/29,391.91 = 8,503.96/x
  3. Step 3: Cross multiply
    19,605.63x = 29,391.91 × 8,503.96
  4. Step 4: Simplify right side
    19,605.63x = 249,947,458.74
  5. Step 5: Solve for x
    x = 249,947,458.74/19,605.63
  6. Step 6: Final answer
    x = 12,748.76

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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.