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Finding the Fourth Proportional to 30,939.26, 42,696.22 and 16,792.11

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Solution

The fourth proportional to 30,939.26, 42,696.22 and 16,792.11 is: 23,173.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,939.26 : 42,696.22 = 16,792.11 : x
  2. Step 2: Convert to fraction form
    30,939.26/42,696.22 = 16,792.11/x
  3. Step 3: Cross multiply
    30,939.26x = 42,696.22 × 16,792.11
  4. Step 4: Simplify right side
    30,939.26x = 716,959,409.34
  5. Step 5: Solve for x
    x = 716,959,409.34/30,939.26
  6. Step 6: Final answer
    x = 23,173.13

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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.