Home / 30,939.78-42,696.90-16,792.62

Finding the Fourth Proportional to 30,939.78, 42,696.90 and 16,792.62

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Solution

The fourth proportional to 30,939.78, 42,696.90 and 16,792.62 is: 23,173.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,939.78 : 42,696.90 = 16,792.62 : x
  2. Step 2: Convert to fraction form
    30,939.78/42,696.90 = 16,792.62/x
  3. Step 3: Cross multiply
    30,939.78x = 42,696.90 × 16,792.62
  4. Step 4: Simplify right side
    30,939.78x = 716,992,816.88
  5. Step 5: Solve for x
    x = 716,992,816.88/30,939.78
  6. Step 6: Final answer
    x = 23,173.82

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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.