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Finding the Fourth Proportional to 13,221.63, 19,815.03 and 6,200.55

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Solution

The fourth proportional to 13,221.63, 19,815.03 and 6,200.55 is: 9,292.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.63 : 19,815.03 = 6,200.55 : x
  2. Step 2: Convert to fraction form
    13,221.63/19,815.03 = 6,200.55/x
  3. Step 3: Cross multiply
    13,221.63x = 19,815.03 × 6,200.55
  4. Step 4: Simplify right side
    13,221.63x = 122,864,084.27
  5. Step 5: Solve for x
    x = 122,864,084.27/13,221.63
  6. Step 6: Final answer
    x = 9,292.66

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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.