Home / 30,969.07-42,736.41-16,821.88

Finding the Fourth Proportional to 30,969.07, 42,736.41 and 16,821.88

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Solution

The fourth proportional to 30,969.07, 42,736.41 and 16,821.88 is: 23,213.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,969.07 : 42,736.41 = 16,821.88 : x
  2. Step 2: Convert to fraction form
    30,969.07/42,736.41 = 16,821.88/x
  3. Step 3: Cross multiply
    30,969.07x = 42,736.41 × 16,821.88
  4. Step 4: Simplify right side
    30,969.07x = 718,906,653.81
  5. Step 5: Solve for x
    x = 718,906,653.81/30,969.07
  6. Step 6: Final answer
    x = 23,213.70

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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.