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Finding the Fourth Proportional to 30,939.38, 42,696.09 and 16,792.23

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Solution

The fourth proportional to 30,939.38, 42,696.09 and 16,792.23 is: 23,173.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,939.38 : 42,696.09 = 16,792.23 : x
  2. Step 2: Convert to fraction form
    30,939.38/42,696.09 = 16,792.23/x
  3. Step 3: Cross multiply
    30,939.38x = 42,696.09 × 16,792.23
  4. Step 4: Simplify right side
    30,939.38x = 716,962,563.38
  5. Step 5: Solve for x
    x = 716,962,563.38/30,939.38
  6. Step 6: Final answer
    x = 23,173.14

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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.