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Finding the Fourth Proportional to 30,939.69, 42,696.95 and 17,510.97

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Solution

The fourth proportional to 30,939.69, 42,696.95 and 17,510.97 is: 24,165.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,939.69 : 42,696.95 = 17,510.97 : x
  2. Step 2: Convert to fraction form
    30,939.69/42,696.95 = 17,510.97/x
  3. Step 3: Cross multiply
    30,939.69x = 42,696.95 × 17,510.97
  4. Step 4: Simplify right side
    30,939.69x = 747,665,010.54
  5. Step 5: Solve for x
    x = 747,665,010.54/30,939.69
  6. Step 6: Final answer
    x = 24,165.24

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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.