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Finding the Fourth Proportional to 19,901.71, 29,854.50 and 7,418.82

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Solution

The fourth proportional to 19,901.71, 29,854.50 and 7,418.82 is: 11,128.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,901.71 : 29,854.50 = 7,418.82 : x
  2. Step 2: Convert to fraction form
    19,901.71/29,854.50 = 7,418.82/x
  3. Step 3: Cross multiply
    19,901.71x = 29,854.50 × 7,418.82
  4. Step 4: Simplify right side
    19,901.71x = 221,485,161.69
  5. Step 5: Solve for x
    x = 221,485,161.69/19,901.71
  6. Step 6: Final answer
    x = 11,128.95

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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.