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Finding the Fourth Proportional to 30,159.59, 41,620.49 and 16,731.72

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Solution

The fourth proportional to 30,159.59, 41,620.49 and 16,731.72 is: 23,089.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,159.59 : 41,620.49 = 16,731.72 : x
  2. Step 2: Convert to fraction form
    30,159.59/41,620.49 = 16,731.72/x
  3. Step 3: Cross multiply
    30,159.59x = 41,620.49 × 16,731.72
  4. Step 4: Simplify right side
    30,159.59x = 696,382,207.95
  5. Step 5: Solve for x
    x = 696,382,207.95/30,159.59
  6. Step 6: Final answer
    x = 23,089.91

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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.