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Finding the Fourth Proportional to 30,355.71, 41,891.42 and 16,745.31

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Solution

The fourth proportional to 30,355.71, 41,891.42 and 16,745.31 is: 23,108.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,355.71 : 41,891.42 = 16,745.31 : x
  2. Step 2: Convert to fraction form
    30,355.71/41,891.42 = 16,745.31/x
  3. Step 3: Cross multiply
    30,355.71x = 41,891.42 × 16,745.31
  4. Step 4: Simplify right side
    30,355.71x = 701,484,730.51
  5. Step 5: Solve for x
    x = 701,484,730.51/30,355.71
  6. Step 6: Final answer
    x = 23,108.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.