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Finding the Fourth Proportional to 13,200,641.28, 19,800,978.84 and 3,616,103.88

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Solution

The fourth proportional to 13,200,641.28, 19,800,978.84 and 3,616,103.88 is: 5,424,160.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,200,641.28 : 19,800,978.84 = 3,616,103.88 : x
  2. Step 2: Convert to fraction form
    13,200,641.28/19,800,978.84 = 3,616,103.88/x
  3. Step 3: Cross multiply
    13,200,641.28x = 19,800,978.84 × 3,616,103.88
  4. Step 4: Simplify right side
    13,200,641.28x = 71,602,396,411,121.89
  5. Step 5: Solve for x
    x = 71,602,396,411,121.89/13,200,641.28
  6. Step 6: Final answer
    x = 5,424,160.45

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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.