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Finding the Fourth Proportional to 30,145.80, 41,601.78 and 16,717.80

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Solution

The fourth proportional to 30,145.80, 41,601.78 and 16,717.80 is: 23,070.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,145.80 : 41,601.78 = 16,717.80 : x
  2. Step 2: Convert to fraction form
    30,145.80/41,601.78 = 16,717.80/x
  3. Step 3: Cross multiply
    30,145.80x = 41,601.78 × 16,717.80
  4. Step 4: Simplify right side
    30,145.80x = 695,490,237.68
  5. Step 5: Solve for x
    x = 695,490,237.68/30,145.80
  6. Step 6: Final answer
    x = 23,070.88

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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.