Home / 30,939.76-42,696.91-16,792.60

Finding the Fourth Proportional to 30,939.76, 42,696.91 and 16,792.60

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Solution

The fourth proportional to 30,939.76, 42,696.91 and 16,792.60 is: 23,173.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,939.76 : 42,696.91 = 16,792.60 : x
  2. Step 2: Convert to fraction form
    30,939.76/42,696.91 = 16,792.60/x
  3. Step 3: Cross multiply
    30,939.76x = 42,696.91 × 16,792.60
  4. Step 4: Simplify right side
    30,939.76x = 716,992,130.87
  5. Step 5: Solve for x
    x = 716,992,130.87/30,939.76
  6. Step 6: Final answer
    x = 23,173.81

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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.