Home / 30,908.93-42,642.25-20,166.44

Finding the Fourth Proportional to 30,908.93, 42,642.25 and 20,166.44

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Solution

The fourth proportional to 30,908.93, 42,642.25 and 20,166.44 is: 27,821.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,908.93 : 42,642.25 = 20,166.44 : x
  2. Step 2: Convert to fraction form
    30,908.93/42,642.25 = 20,166.44/x
  3. Step 3: Cross multiply
    30,908.93x = 42,642.25 × 20,166.44
  4. Step 4: Simplify right side
    30,908.93x = 859,942,376.09
  5. Step 5: Solve for x
    x = 859,942,376.09/30,908.93
  6. Step 6: Final answer
    x = 27,821.81

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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.