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Finding the Fourth Proportional to 21,007.88, 31,508.98 and 6,218.36

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Solution

The fourth proportional to 21,007.88, 31,508.98 and 6,218.36 is: 9,326.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.88 : 31,508.98 = 6,218.36 : x
  2. Step 2: Convert to fraction form
    21,007.88/31,508.98 = 6,218.36/x
  3. Step 3: Cross multiply
    21,007.88x = 31,508.98 × 6,218.36
  4. Step 4: Simplify right side
    21,007.88x = 195,934,180.87
  5. Step 5: Solve for x
    x = 195,934,180.87/21,007.88
  6. Step 6: Final answer
    x = 9,326.70

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.