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Finding the Fourth Proportional to 19,791.64, 29,689.02 and 6,643.96

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Solution

The fourth proportional to 19,791.64, 29,689.02 and 6,643.96 is: 9,966.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,791.64 : 29,689.02 = 6,643.96 : x
  2. Step 2: Convert to fraction form
    19,791.64/29,689.02 = 6,643.96/x
  3. Step 3: Cross multiply
    19,791.64x = 29,689.02 × 6,643.96
  4. Step 4: Simplify right side
    19,791.64x = 197,252,661.32
  5. Step 5: Solve for x
    x = 197,252,661.32/19,791.64
  6. Step 6: Final answer
    x = 9,966.46

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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.