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Finding the Fourth Proportional to 30,469.57, 42,049.63 and 17,040.78

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Solution

The fourth proportional to 30,469.57, 42,049.63 and 17,040.78 is: 23,517.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,469.57 : 42,049.63 = 17,040.78 : x
  2. Step 2: Convert to fraction form
    30,469.57/42,049.63 = 17,040.78/x
  3. Step 3: Cross multiply
    30,469.57x = 42,049.63 × 17,040.78
  4. Step 4: Simplify right side
    30,469.57x = 716,558,515.21
  5. Step 5: Solve for x
    x = 716,558,515.21/30,469.57
  6. Step 6: Final answer
    x = 23,517.19

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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.